feat(react): add format option for buildable libs

[jaysoo]

This PR adds the --format option to users can specify esm,umd,cjs formats for their library.

For example,

nx build my-lib --format esm,cjs
nx build my-lib --format esm

By default, esm,umd will be used.

Notes

• Clean up @nrwl/web:package executor
• Combine react package e2e tests to speed up test time

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Status	Command
	nx affected --target=e2e --base=74964834e5aa7d54b28d76d562086b5d9ee1c7d2
	nx affected --target=lint --base=74964834e5aa7d54b28d76d562086b5d9ee1c7d2 --parallel --max-parallel=4
	nx affected --target=test --base=74964834e5aa7d54b28d76d562086b5d9ee1c7d2 --parallel --max-parallel=2
	nx affected --target=build --base=74964834e5aa7d54b28d76d562086b5d9ee1c7d2 --parallel --max-parallel=3
	nx build typedoc-theme

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[pstepniewskiconfigit]

@jaysoo @FrozenPandaz there is still reference to umd in package.json after building only esm

[github-actions]

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