wasm: restructure wasm test flakes for bazel build

[Shikugawa]

Signed-off-by: shikugawa [email protected]

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Description: This is a part of cleanup of wasm build with bazel. I'm planning to restructure directories related with wasm for testing like below.

test/extensions/
  └ wasm_data/
        ├ WORKSPACE
        ├ .bazelrc
        ├ BUILD
        ├ bazel            # bazel settings
        ├ access_loggers   # moved from test/extensions/access_loggers/wasm/test_data
	├ common           # moved from test/extensions/common/wasm/test_data
	├ functionality    # moved from test/extensions/wasm/test_data
        └ filter
           ├ network       # L4 wasm filters
           └ http          # L7 wasm filters

• null_plugin build
• proxy_wasm in Rust build with bazel
• bazel in bazel approach to build them from root
• test all of wasm with single bazel command. build wasm and test

Risk Level: Low
Testing:
Docs Changes:
Release Notes:
[Optional Fixes #Issue]
[Optional Deprecated:]

[PiotrSikora]

What's the purpose of this change?

[Shikugawa]

@PiotrSikora This is only cleanup. It seems that we will be suffered from the complexity of the directory structure for wasm for testing. I think that we should aggregate the data. So we need this, I see.
I want to destroy and aggregate these directories in the future.

test/extensions/wasm/test_data
test/extensions/common/wasm/test_data
test/extensions/filters/http/wasm/test_data
test/extensions/filters/network/wasm/test_data
test/extensions/access_loggers/wasm/test_data

[Shikugawa]

Close this PR because I want to apply transition based wasm build in another.