chore: Auto-update of analysis_options.yaml

[ditman]

Description

When preparing the pub packages for release, when running flutter pub get, we got a couple of automatic changes to our analysis_options.yaml files. This CL commits them so build steps don't leave the repo dirty to other developers.

Here's the log of the flutter pub get invocation:

$ flutter pub get
Resolving dependencies... 
Downloading packages... 
  _fe_analyzer_shared 92.0.0 (105.0.0 available)
  analyzer 9.0.0 (14.1.0 available)
  analyzer_buffer 0.3.0 (0.3.3 available)
  anthropic_sdk_dart 5.0.0 (6.0.0 available)
  build 4.0.7 (4.0.8 available)
  build_runner 2.15.1 (2.15.2 available)
  dart_style 3.1.3 (3.1.12 available)
  flutter_riverpod 3.3.1 (3.3.2 available)
  googleai_dart 8.0.0 (9.0.0 available)
  json_annotation 4.11.0 (4.12.0 available)
  json_serializable 6.13.0 (6.14.0 available)
  mistralai_dart 4.0.0 (5.0.0 available)
  mockito 5.6.4 (5.7.0 available)
  package_config 2.2.0 (3.0.0 available)
  preact_signals 1.9.4 (7.0.0 available)
  riverpod 3.2.1 (3.3.2 available)
  riverpod_analyzer_utils 1.0.0-dev.9 (1.0.0-dev.10 available)
  riverpod_annotation 4.0.2 (4.0.3 available)
  riverpod_generator 4.0.3 (4.0.4 available)
  test 1.31.1 (1.31.2 available)
  test_api 0.7.12 (0.7.13 available)
  test_core 0.6.18 (0.6.19 available)
Got dependencies!
22 packages have newer versions incompatible with dependency constraints.
Try `flutter pub outdated` for more information.
Upgrading analysis_options.yaml to exclude build and platform directories.
Upgrading analysis_options.yaml to exclude build and platform directories.

$ git status
On branch update-analysis-options
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   analysis_options.yaml
	modified:   dev_tools/composer/analysis_options.yaml

(Note the "Upgrading analysis_options.yaml to exclude build and platform directories." message in the log)

• Related: [flutter_tools] Migrate analysis_options.yaml to exclude build and platform directories by default flutter#187940

Pre-launch Checklist

• I read the Flutter Style Guide recently, and have followed its advice.
• I signed the CLA.
• I read the Contributors Guide.
• I have added sample code updates to the changelog.
• I updated/added relevant documentation (doc comments with ///).
• If my PR is a fork PR, I've checked that [e2e tests] passed.

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