Upgrade package:vm_service to 14.2.1 (#146896)

dev/a11y_assessments/pubspec.yaml

dev/automated_tests/pubspec.yaml

dev/benchmarks/complex_layout/pubspec.yaml

dev/benchmarks/macrobenchmarks/pubspec.yaml

dev/benchmarks/microbenchmarks/pubspec.yaml

dev/benchmarks/platform_channels_benchmarks/pubspec.yaml

dev/benchmarks/platform_views_layout/pubspec.yaml

...rks/platform_views_layout_hybrid_composition/pubspec.yaml

dev/benchmarks/test_apps/stocks/pubspec.yaml

dev/bots/pubspec.yaml

dev/conductor/core/pubspec.yaml

dev/customer_testing/pubspec.yaml

dev/devicelab/pubspec.yaml

...ration_tests/android_embedding_v2_smoke_test/pubspec.yaml

dev/integration_tests/android_semantics_testing/pubspec.yaml

dev/integration_tests/android_verified_input/pubspec.yaml

dev/integration_tests/android_views/pubspec.yaml

dev/integration_tests/channels/pubspec.yaml

dev/integration_tests/deferred_components_test/pubspec.yaml

dev/integration_tests/external_textures/pubspec.yaml