Fix newly added strict_top_level_inference everywhere #1198

Job	Run time
mono_repo self validate	13s
analyzer_and_format; Dart 3.6.0; PKGS: _test_yaml, checked_yaml, example, json_annotation, json_s...	37s
analyzer_and_format; Dart dev; PKGS: _test_yaml, checked_yaml, example, json_annotation, json_ser...	43s
unit_test; Dart 3.6.0; PKG: json_serializable; `dart test --run-skipped -t presubmit-only test/an...	2m 11s
unit_test; Dart 3.6.0; PKGS: _test_yaml, checked_yaml, example, json_serializable; `dart test`	51s
unit_test; Dart 3.6.0; PKG: json_serializable; `dart test -p chrome`	55s
unit_test; Dart 3.6.0; PKG: json_serializable; `dart test --run-skipped -t presubmit-only test/en...	46s
unit_test; Dart dev; PKGS: _test_yaml, checked_yaml, example, json_serializable; `dart test`	53s
unit_test; Dart dev; PKG: json_serializable; `dart test --run-skipped -t presubmit-only test/anno...	2m 16s
unit_test; Dart dev; PKG: json_serializable; `dart test --run-skipped -t presubmit-only test/ensu...	49s
unit_test; Dart dev; PKG: json_serializable; `dart test -p chrome`	40s
ensure_build; Dart 3.6.0; PKGS: _test_yaml, checked_yaml, example; `dart test --run-skipped -t pr...	1m 16s
ensure_build; Dart dev; PKGS: _test_yaml, checked_yaml, example; `dart test --run-skipped -t pres...	1m 22s
	13m 32s

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