feat: Support iframes in container media content #4622

Job	Run time
dry-run / Build browser-test-tools	2m 34s
dry-run / Build collection-hooks	1m 0s
dry-run / Build global-styles	26s
dry-run / Build jest-preset	20s
dry-run / Build documenter	2m 16s
dry-run / Build test-utils	1m 21s
dry-run / Build theming-core	1m 23s
dry-run / Build component-toolkit	1m 0s
dry-run / Build components	6m 37s
dry-run / Components integration tests	15m 59s
dry-run / Components accessibility tests	29m 44s
dry-run / Components unit tests	10m 1s
dry-run / Build board components	3m 31s
dry-run / Demos tests	14m 47s
	1h 30m 59s

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