fix(angular): validate standalone option in the directive generator

[leosvelperez]

Current Behavior

The directive generator doesn't validate the standalone option for Angular versions that don't support it (<14.1.0).

Expected Behavior

The directive generator should validate the standalone option for Angular versions that don't support it (<14.1.0).

Related Issue(s)

Fixes #

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 3, 2023 9:49am

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✅ Successfully ran 8 targets

• nx run-many -t e2e-macos --parallel=1 --exclude=e2e-detox
• nx affected --target=e2e --base=9b60863b7b211e9efe16689376a0bfef5100cd6f --head=28839d653e9f97c1a189e7ec1d0738d514e3ff6d --parallel=1
• nx affected --target=test --base=9b60863b7b211e9efe16689376a0bfef5100cd6f --head=28839d653e9f97c1a189e7ec1d0738d514e3ff6d --parallel=1
• nx affected --target=build --base=9b60863b7b211e9efe16689376a0bfef5100cd6f --head=28839d653e9f97c1a189e7ec1d0738d514e3ff6d --parallel=3
• nx run-many -t root-lint check-imports check-commit check-lock-files depcheck --parallel=1 --no-dte
• nx affected --target=lint --base=9b60863b7b211e9efe16689376a0bfef5100cd6f --head=28839d653e9f97c1a189e7ec1d0738d514e3ff6d --parallel=3
• nx-cloud record -- nx format:check --base=9b60863b7b211e9efe16689376a0bfef5100cd6f --head=28839d653e9f97c1a189e7ec1d0738d514e3ff6d
• nx documentation --no-dte

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[github-actions]

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