[local-build-plugin] Replace bunyan with @expo/bunyan

[brentvatne]

Why

The local-build plugin directly depends on legacy bunyan, which brings deprecated transitive packages and the dtrace-provider install script.

How

• Replace Bunyan with @expo/bunyan only in the local-build plugin.
• Keep public @expo/logger on legacy Bunyan so rotating-file streams remain supported.
• Remove the incidental Bunyan development dependency from Build Tools and use the logger-exported type in its test mock.
• Declare Bunyan directly in Steps because packages/steps/cli.sh invokes its formatter binary.
• Add public logger contract tests, including rotating-file streams, to prevent the replacement from expanding beyond the compatible scope.

Test Plan

• yarn workspace @expo/logger test --runInBand --watchman=false (11 tests)
• yarn workspace @expo/logger typecheck
• yarn workspace @expo/build-tools typecheck
• yarn workspace eas-cli-local-build-plugin typecheck
• yarn workspace @expo/steps typecheck
• yarn workspace @expo/steps run bunyan --version

Stack

1. #4281 — minizlib 3.1.0
2. #4282 — uuid v11
3. #4283 — remove lodash.get
4. #4284 — local-build @expo/bunyan
5. #4285 — prebuild fallback regression tests

This PR depends on #4283.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.51%. Comparing base (bfdd522) to head (31ca657).

Additional details and impacted files

@@                     Coverage Diff                     @@
##           brent/remove-lodash-get    #4284      +/-   ##
===========================================================
+ Coverage                    64.47%   64.51%   +0.04%     
===========================================================
  Files                         1049     1052       +3     
  Lines                        48464    48517      +53     
  Branches                     10213    10224      +11     
===========================================================
+ Hits                         31243    31294      +51     
- Misses                       17105    17107       +2     
  Partials                       116      116              

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[github-actions]

✅ Thank you for adding the changelog entry!