De-async health checks (#208) #728

Job	Run time
mono_repo self validate	15s
analyze_and_format; Dart dev; PKGS: pkgs/corpus, pkgs/dart_flutter_team_lints, pkgs/firehose, pkg...	36s
analyze_and_format; Dart 3.0.0; PKGS: pkgs/corpus, pkgs/dart_flutter_team_lints, pkgs/firehose, p...	30s
analyze_and_format; Dart dev; PKGS: pkgs/corpus, pkgs/dart_flutter_team_lints, pkgs/firehose, pkg...	28s
unit_test; Dart 3.0.0; PKG: pkgs/corpus; `dart test`	40s
unit_test; Dart 3.0.0; PKG: pkgs/dart_flutter_team_lints; `dart test`	26s
unit_test; Dart 3.0.0; PKG: pkgs/firehose; `dart test`	32s
unit_test; Dart dev; PKG: pkgs/corpus; `dart test`	53s
unit_test; Dart dev; PKG: pkgs/firehose; `dart test`	27s
unit_test; Dart dev; PKG: pkgs/dart_flutter_team_lints; `dart test`	30s
analyze_format; Dart dev; PKG: pkgs/blast_repo; `dart format --output=none --set-exit-if-changed ...	18s
test; Dart dev; PKG: pkgs/blast_repo; `dart test --test-randomize-ordering-seed=random`	26s
	6m 1s

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