Bump version to "v19.2.21" with changelog. #11909

Job	Run time
analyze	7s
build	2m 52s
lint	2m 25s
e2e-package-managers (ubuntu-latest, 22, pnpm, 2)	6m 19s
e2e-package-managers (ubuntu-latest, 22, yarn, 1)	6m 59s
e2e-package-managers (ubuntu-latest, 22, yarn, 0)	8m 28s
e2e-package-managers (ubuntu-latest, 22, pnpm, 0)	6m 26s
test	18m 13s
e2e (ubuntu-latest, 22, npm, 4)	8m 49s
e2e (ubuntu-latest, 22, npm, 5)	10m 50s
e2e-package-managers (ubuntu-latest, 22, pnpm, 1)	5m 22s
e2e (ubuntu-latest, 22, npm, 2)	11m 35s
e2e (ubuntu-latest, 22, esbuild, 5)	7m 45s
e2e (ubuntu-latest, 22, esbuild, 1)	12m 20s
e2e (ubuntu-latest, 22, npm, 1)	12m 38s
e2e (ubuntu-latest, 22, esbuild, 3)	10m 3s
e2e (ubuntu-latest, 22, npm, 3)	11m 28s
e2e (ubuntu-latest, 22, esbuild, 2)	11m 21s
e2e (ubuntu-latest, 22, esbuild, 4)	8m 14s
e2e-package-managers (ubuntu-latest, 22, yarn, 2)	7m 17s
e2e (ubuntu-latest, 22, esbuild, 0)	9m 48s
e2e (ubuntu-latest, 22, npm, 0)	11m 17s
e2e-snapshots	0s
	3h 10m 36s

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