fix(angular): local imports in webpack-dev-server custom config

[Michsior14]

Fixes the implementation of webpack-dev-server to allow imports of local libraries in custom webpack config typescript files. This aligns the behavior with the webpack-browser and webpack-server builders.

Current Behavior

After the cleanup story #12924 (this change), custom webpack files lost the possibility to import local libraries. Each serve command ends up with error being thrown regarding unresolved dependencies while build works fine.

Expected Behavior

The serve command works in the same way as build and allow referencing local libraries.

Related Issue(s)

Fixes #13233

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✅ Successfully ran 12 targets

• nx affected --target=e2e --base=2a671e71044e6d8b5dcd7ee1d91c5e3df8efcb5d --head=969b1fed5bb2ef010c901a6a5b054ebbe2458cee --exclude=e2e-storybook,e2e-storybook-angular,e2e-react-native,e2e-detox --parallel=1
• nx-cloud record -- yarn depcheck
• nx affected --target=build --base=2a671e71044e6d8b5dcd7ee1d91c5e3df8efcb5d --head=969b1fed5bb2ef010c901a6a5b054ebbe2458cee --parallel=3
• nx affected --target=lint --base=2a671e71044e6d8b5dcd7ee1d91c5e3df8efcb5d --head=969b1fed5bb2ef010c901a6a5b054ebbe2458cee --parallel=3
• nx-cloud record -- yarn nx workspace-lint
• nx-cloud record -- yarn check-lock-files
• nx-cloud record -- yarn check-commit
• nx affected --target=test --base=2a671e71044e6d8b5dcd7ee1d91c5e3df8efcb5d --head=969b1fed5bb2ef010c901a6a5b054ebbe2458cee --parallel=1
• nx-cloud record -- yarn nx format:check --base=2a671e71044e6d8b5dcd7ee1d91c5e3df8efcb5d --head=969b1fed5bb2ef010c901a6a5b054ebbe2458cee
• nx-cloud record -- yarn check-imports
• nx-cloud record -- yarn documentation
• nx build typedoc-theme

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[Michsior14]

Not sure, but I think it should also default to options.tsConfig if undefined in case of buildable libraries.

[Coly010]

LGTM! 🎉 Thanks for this!

[github-actions]

This pull request has already been merged/closed. If you experience issues related to these changes, please open a new issue referencing this pull request.