chore: use bazelrc_preset.bzl module to stay on top of .bazelrc settings

[dcarp]

• Add the bazelrc-preset.bzl dependency to MODULE.bazel to support generation of the preset file.
• Update CI workflow and buildifier steps to use the new Bazel configuration preset by switching to --config=ci for Bazel commands, ensuring CI-specific flags are applied.
• Upgrade some bzlmod dependencies.

[Copilot]

Pull Request Overview

This PR migrates the project to use the bazelrc-preset.bzl module for standardized Bazel configuration management, replacing scattered configuration flags with a centralized preset system.

• Adds bazelrc-preset.bzl dependency to generate comprehensive Bazel configuration presets
• Updates CI workflows to use --config=ci flag for consistent CI-specific settings
• Upgrades several bzlmod dependencies to newer versions

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tools/preset.bazelrc	Generated comprehensive Bazel configuration preset with CI-specific flags
tools/BUILD.bazel	Adds bazelrc_preset target for configuration generation
e2e/smoke/.bazelrc	Migrates to import preset configuration, removes duplicate flags
MODULE.bazel	Adds bazelrc-preset.bzl dependency and upgrades other dependencies
.github/workflows/ci.yaml	Updates CI to use --config=ci flag
.github/workflows/ci.bazelrc	Removes dedicated CI bazelrc file (replaced by preset)
.github/workflows/buildifier.yaml	Updates buildifier to use --config=ci flag
.bazelversion	Updates Bazel version from 7.6.1 to 7.6.2
.bazelrc	Migrates to import preset configuration, removes duplicate flags

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}