feat: Updates severity notification palette #10718

Job	Run time
dry-run / Create build tree	2s
dry-run / Build documenter	4s
dry-run / Build browser-test-tools	2s
dry-run / Build build-tools	3s
dry-run / Build collection-hooks	2s
dry-run / Build global-styles	4s
dry-run / Build jest-preset	5s
dry-run / Build component-toolkit	2s
dry-run / Build test-utils	2s
dry-run / Build theming-core	3s
dry-run / Build components	2m 50s
dry-run / Build code view components	1m 4s
dry-run / Build board components	1m 55s
dry-run / Build chat components	1m 12s
dry-run / Components accessibility tests shards (1)	49s
dry-run / Components accessibility tests shards (2)	10m 0s
dry-run / Components integration tests shards (1)	9m 55s
dry-run / Components motion tests	1m 9s
dry-run / Components unit tests	3m 56s
dry-run / Components accessibility tests shards (3)	9m 44s
dry-run / Components integration tests shards (2)	10m 49s
dry-run / Components accessibility tests shards (4)	52s
dry-run / Components integration tests shards (3)	7m 59s
dry-run / Components accessibility tests shards (5)	10m 12s
dry-run / Components integration tests shards (4)	7m 18s
dry-run / Components accessibility tests shards (6)	9m 38s
dry-run / Demos tests	7m 14s
dry-run / Components accessibility tests	1s
dry-run / Components integration tests	1s
	1h 37m 7s

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