fix(testing): provide better error messages around component test --build-target

[barbados-clemens]

Current Behavior

when error happens in finding the build target for component testing they aren't helpful into why a build target won't work or why the generator didn't find a build target

Expected Behavior

More helpful errors when providing a build target that's invalid

Related Issue(s)

Fixes #12844

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✅ Successfully ran 12 targets

• nx affected --target=test --base=2cddd68595fc9308fb3f4d937f1e3f2b8adcf92d --head=71268886ae9082c00ea8c753ca05df693172f321 --parallel=1
• nx-cloud record -- yarn depcheck
• nx affected --target=lint --base=2cddd68595fc9308fb3f4d937f1e3f2b8adcf92d --head=71268886ae9082c00ea8c753ca05df693172f321 --parallel=3
• nx affected --target=e2e --base=2cddd68595fc9308fb3f4d937f1e3f2b8adcf92d --head=71268886ae9082c00ea8c753ca05df693172f321 --exclude=e2e-storybook,e2e-storybook-angular,e2e-react-native,e2e-detox,e2e-make-angular-cli-faster --parallel=1
• nx-cloud record -- yarn nx workspace-lint
• nx-cloud record -- yarn check-lock-files
• nx affected --target=build --base=2cddd68595fc9308fb3f4d937f1e3f2b8adcf92d --head=71268886ae9082c00ea8c753ca05df693172f321 --parallel=3
• nx-cloud record -- yarn check-commit
• nx-cloud record -- yarn nx format:check --base=2cddd68595fc9308fb3f4d937f1e3f2b8adcf92d --head=71268886ae9082c00ea8c753ca05df693172f321
• nx-cloud record -- yarn check-imports
• nx-cloud record -- yarn documentation
• nx build typedoc-theme

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1 Ignored Deployment

Name	Status	Preview	Updated
nx-dev	⬜️ Ignored (Inspect)		Nov 2, 2022 at 11:03PM (UTC)

[AgentEnder]

Lgtm

[github-actions]

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