fix(@ngtools/webpack): fix paths-plugin to allow '*' as alias

[chrisfitz]

This is a follow up to #3443 that didn't quite fix #3441.

This simplifies the plugin by sending the request path to ts.nodeModuleNameResolver and lets Typescript figure out its true path rather than looping through all the path options manually like it was previously doing.

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[chrisfitz]

I signed it!

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CLAs look good, thanks!

[Meligy]

Is it possible to write a test for this?

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