chore: make validator-count flag less breaking

[technicallyty]

Description

Closes: #23975

previously, you could do init-files --v 3 to init testnet files with 3 validators. the flag has since been named to --validator-count with a shorthand of -n, but i think moving this to -v would be a more intuitive break.

---

Author Checklist

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please add links to any relevant follow up issues.

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• included the correct type prefix in the PR title, you can find examples of the prefixes below:
• confirmed ! in the type prefix if API or client breaking change
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• provided a link to the relevant issue or specification
• reviewed "Files changed" and left comments if necessary
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• updated the relevant documentation or specification, including comments for documenting Go code
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I have...

• confirmed the correct type prefix in the PR title
• confirmed all author checklist items have been addressed
• reviewed state machine logic, API design and naming, documentation is accurate, tests and test coverage

[github-actions]

⚠️ govulncheck found vulnerabilities:

mkdir -p /home/runner/work/cosmos-sdk/cosmos-sdk/build/
GOBIN=/home/runner/work/cosmos-sdk/cosmos-sdk/build go install golang.org/x/vuln/cmd/govulncheck@latest
go: downloading golang.org/x/vuln v1.1.4
go: downloading golang.org/x/telemetry v0.0.0-20240522233618-39ace7a40ae7
go: downloading golang.org/x/mod v0.22.0
go: downloading golang.org/x/tools v0.29.0
/home/runner/work/cosmos-sdk/cosmos-sdk/build/govulncheck ./...
=== Symbol Results ===

Vulnerability #1: GO-2025-3443
    CometBFT allows a malicious peer to stall the network by disseminating
    seemingly valid block parts in github.com/cometbft/cometbft
  More info: https://pkg.go.dev/vuln/GO-2025-3443
  Module: github.com/cometbft/cometbft
    Found in: github.com/cometbft/[email protected]
    Fixed in: github.com/cometbft/[email protected]
    Example traces found:
      #1: testutil/network/util.go:74:24: network.startInProcess calls service.BaseService.Start, which eventually calls types.Part.ValidateBasic
      #2: testutil/network/util.go:74:24: network.startInProcess calls service.BaseService.Start, which eventually calls types.Part.ValidateBasic
      #3: client/rpc/block.go:56:36: rpc.QueryBlocks calls local.Local.BlockSearch, which eventually calls types.PartFromProto
      #4: client/rpc/block.go:56:36: rpc.QueryBlocks calls local.Local.BlockSearch, which eventually calls types.PartFromProto

Your code is affected by 1 vulnerability from 1 module.
This scan also found 0 vulnerabilities in packages you import and 2
vulnerabilities in modules you require, but your code doesn't appear to call
these vulnerabilities.
Use '-show verbose' for more details.
make: *** [Makefile:155: vulncheck] Error 3

[github-actions]

    ⚠️ **govulncheck found vulnerabilities:**


    >mkdir -p /home/runner/work/cosmos-sdk/cosmos-sdk/build/

GOBIN=/home/runner/work/cosmos-sdk/cosmos-sdk/build go install golang.org/x/vuln/cmd/govulncheck@latest
go: downloading golang.org/x/vuln v1.1.4
go: downloading golang.org/x/telemetry v0.0.0-20240522233618-39ace7a40ae7
go: downloading golang.org/x/mod v0.22.0
go: downloading golang.org/x/tools v0.29.0
/home/runner/work/cosmos-sdk/cosmos-sdk/build/govulncheck ./...
=== Symbol Results ===

Vulnerability #1: GO-2025-3443
CometBFT allows a malicious peer to stall the network by disseminating
seemingly valid block parts in github.com/cometbft/cometbft
More info: https://pkg.go.dev/vuln/GO-2025-3443
Module: github.com/cometbft/cometbft
Found in: github.com/cometbft/[email protected]
Fixed in: github.com/cometbft/[email protected]
Example traces found:
#1: testutil/network/util.go:74:24: network.startInProcess calls service.BaseService.Start, which eventually calls types.Part.ValidateBasic
#2: testutil/network/util.go:74:24: network.startInProcess calls service.BaseService.Start, which eventually calls types.Part.ValidateBasic
#3: client/rpc/block.go:56:36: rpc.QueryBlocks calls local.Local.BlockSearch, which eventually calls types.PartFromProto
#4: client/rpc/block.go:56:36: rpc.QueryBlocks calls local.Local.BlockSearch, which eventually calls types.PartFromProto

Your code is affected by 1 vulnerability from 1 module.
This scan also found 0 vulnerabilities in packages you import and 2
vulnerabilities in modules you require, but your code doesn't appear to call
these vulnerabilities.
Use '-show verbose' for more details.
make: *** [Makefile:155: vulncheck] Error 3

[github-actions]

    ⚠️ **govulncheck found vulnerabilities:**


    >mkdir -p /home/runner/work/cosmos-sdk/cosmos-sdk/build/

GOBIN=/home/runner/work/cosmos-sdk/cosmos-sdk/build go install golang.org/x/vuln/cmd/govulncheck@latest
go: downloading golang.org/x/vuln v1.1.4
go: downloading golang.org/x/telemetry v0.0.0-20240522233618-39ace7a40ae7
go: downloading golang.org/x/mod v0.22.0
go: downloading golang.org/x/tools v0.29.0
/home/runner/work/cosmos-sdk/cosmos-sdk/build/govulncheck ./...
=== Symbol Results ===

Vulnerability #1: GO-2025-3443
CometBFT allows a malicious peer to stall the network by disseminating
seemingly valid block parts in github.com/cometbft/cometbft
More info: https://pkg.go.dev/vuln/GO-2025-3443
Module: github.com/cometbft/cometbft
Found in: github.com/cometbft/[email protected]
Fixed in: github.com/cometbft/[email protected]
Example traces found:
#1: testutil/network/util.go:74:24: network.startInProcess calls service.BaseService.Start, which eventually calls types.Part.ValidateBasic
#2: testutil/network/util.go:74:24: network.startInProcess calls service.BaseService.Start, which eventually calls types.Part.ValidateBasic
#3: client/rpc/block.go:56:36: rpc.QueryBlocks calls local.Local.BlockSearch, which eventually calls types.PartFromProto
#4: client/rpc/block.go:56:36: rpc.QueryBlocks calls local.Local.BlockSearch, which eventually calls types.PartFromProto

Your code is affected by 1 vulnerability from 1 module.
This scan also found 0 vulnerabilities in packages you import and 2
vulnerabilities in modules you require, but your code doesn't appear to call
these vulnerabilities.
Use '-show verbose' for more details.
make: *** [Makefile:155: vulncheck] Error 3