Release 2.5.3, 9.1.1, build_test 3.1.1.

[davidmorgan]

Two fixes to get the source_gen tests working and one unrelated bug fix..

[github-actions]

PR Health

Changelog Entry ✔️

Package	Changed Files

Changes to files need to be accounted for in their respective changelogs.

[github-actions]

Package publishing

Package	Version	Status	Publish tag (post-merge)
package:build	2.5.3	ready to publish	build-v2.5.3
package:build_config	1.1.3-wip	WIP (no publish necessary)
package:build_daemon	4.0.5-wip	WIP (no publish necessary)
package:build_modules	5.0.13	already published at pub.dev
package:build_resolvers	2.5.3	ready to publish	build_resolvers-v2.5.3
package:build_runner	2.5.3	ready to publish	build_runner-v2.5.3
package:build_runner_core	9.1.1	ready to publish	build_runner_core-v9.1.1
package:build_test	3.1.1	ready to publish	build_test-v3.1.1
package:build_web_compilers	4.1.5	already published at pub.dev
package:scratch_space	1.0.3-wip	WIP (no publish necessary)

Documentation at https://github.com/dart-lang/ecosystem/wiki/Publishing-automation.