chore(deps): update dependency build_runner to v2.15.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	Pending
build_runner (source)	dev_dependencies	patch	2.15.0 → 2.15.1	2.15.2

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Release Notes

dart-lang/build (build_runner)

v2.15.1

Compare Source

• Pass Dart SDK --packages arg to builder compiles, so they can be compiled
  with different packages to the current version solve.
• More efficient watching for file changes in workspaces and other setups with
  nested packages.
• Support builders with no declared outputs. They can't output anything, but
  they can do processing, write log messages and choose whether to fail the
  build.
• Mention in command usage that --define values are parsed as JSON with a
  fallback.
• Performance: reduce size of serialized build state when there are optional
  outputs that are not written.
• Bug fix: handle errors from post process builders in previous runs without
  crashing.
• Bug fix: fix dart run build_runner test to correctly pass arguments after
  -- to the test process.
• Bug fix: fix crash if a resolved Dart source contains invalid utf8.
• Bug fix: fix incorrect output when builder code changes during builder
  compile.
• Bug fix: do a clean build when switching between a workspace build and a
  package build, as incremental builds were sometimes incorrect.
• Require Dart 3.8.0.

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