`DisclosurePrimitive` - Implement a11y toggled content pattern #13530

Job	Run time
Get files changed and conditionally skip CI	10s
Tests	6m 4s
ember-lts-3.28	5m 12s
ember-lts-4.12	3m 11s
ember-beta	3m 8s
embroider-safe	3m 5s
	20m 50s

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