fix: replace aliased imports for tsx and jsx files

[pkerschbaum]

PR Checklist

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• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
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PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Other... Please describe:

What is the current behavior?

Commands like nest start and nest build replace the path of imports using path aliases with its relative path.
But this currently fails for imports pointing to a .tsx or jsx file.

Issue Number: #1547

What is the new behavior?

Path aliases are replaced not only for imports pointing to .ts and .js files, but for .tsx or jsx also.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

[kamilmysliwiec]

LGTM 🎉