refactor: use `executeWithCases` instead of RXJS boillerplate #6644

Job	Run time
lint	2m 26s
build	6m 54s
analyze	8s
test	1m 8s
e2e-package-managers (ubuntu-latest, 22, yarn, 1)	1m 7s
e2e-windows-subset	57s
e2e-package-managers (ubuntu-latest, 22, yarn, 2)	1m 7s
e2e-package-managers (ubuntu-latest, 22, pnpm, 1)	1m 7s
e2e-package-managers (ubuntu-latest, 22, pnpm, 0)	1m 8s
e2e-package-managers (ubuntu-latest, 22, yarn, 0)	1m 7s
e2e (ubuntu-latest, 22, npm, 1)	1m 6s
e2e-package-managers (ubuntu-latest, 22, pnpm, 2)	1m 7s
e2e (ubuntu-latest, 22, npm, 0)	1m 5s
e2e (ubuntu-latest, 22, esbuild, 2)	1m 7s
e2e (ubuntu-latest, 22, npm, 5)	1m 7s
e2e (ubuntu-latest, 22, esbuild, 0)	59s
e2e (ubuntu-latest, 22, esbuild, 5)	1m 7s
e2e (ubuntu-latest, 22, npm, 2)	1m 5s
e2e (ubuntu-latest, 22, npm, 4)	1m 8s
e2e (ubuntu-latest, 22, esbuild, 4)	1m 6s
e2e (ubuntu-latest, 22, esbuild, 1)	1m 6s
e2e-snapshots	0s
e2e (ubuntu-latest, 22, npm, 3)	1m 6s
e2e (ubuntu-latest, 22, esbuild, 3)	1m 7s
	31m 25s

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