fix: clone redirected SourceFile's prototype

[merceyz]

When cloneSourceFileWithChanges clones a SourceFile it doesn't climb the prototype chain causing it to clone SourceFiles created by createRedirectSourceFile incorrectly.

I tried to write a test but was unable to figure it out so going to need some assistance on that, tested on the commit before https://github.com/tophat/monodeploy/commit/b2d532d6f3b1e0686d2857d1195409149591b4eb to confirm that it works

cc @armanio123 - the assignee on #41717

Fixes #41717

[armanio123]

@sandersn do you know how can we add a test for this scenario?

[sandersn]

@rbuckton is the main author of nodeFactory and might have an idea of how to test this.

Some guesses: If you can repro this from a single invocation of tsc you might get away with a compiler test. You can recreate an entire project's files with the // @filename: x.ts directive, including tsconfig.
If it requires the build system, there are build-system unit tests somewhere. Look for PRs from @sheetalkamat since she has worked on that area a lot.

[joeblynch]

This fixes #41717 for me as well. Thanks for the fix!

[oreporan]

Hey - any chances of this going in? fixes my length of undefined bug!

[sheetalkamat]

Closing this in favor of #48862