feat: Use i18nStrings as fallback flash icon labels #4405

Job	Run time
dry-run / Build browser-test-tools	2m 32s
dry-run / Build collection-hooks	1m 1s
dry-run / Build global-styles	36s
dry-run / Build jest-preset	18s
dry-run / Build documenter	2m 26s
dry-run / Build test-utils	1m 10s
dry-run / Build theming-core	55s
dry-run / Build component-toolkit	58s
dry-run / Build components	4m 47s
dry-run / Components integration tests	16m 37s
dry-run / Components accessibility tests	28m 29s
dry-run / Components unit tests	6m 54s
dry-run / Build board components	4m 17s
dry-run / Demos tests	14m 47s
	1h 25m 47s

Provide feedback