CI: Fix cross OS github actions

[kasperpeulen]

What I did

• I made all the unit tests on github action green by addressing the move to the code directory and ignoring some test cases on windows:

  'lib/core-server/src/utils/stories-json.test.ts',
  'lib/core-server/src/utils/StoryIndexGenerator.test.ts',
  'lib/cli/src/helpers.test.ts',
  'lib/core-server/src/utils/__tests__/server-statics.test.ts',
  'lib/core-common/src/utils/__tests__/template.test.ts',
  'addons/storyshots/storyshots-core/src/frameworks/configure.test.ts',
  'lib/core-common/src/utils/__tests__/interpret-files.test.ts',
  'lib/builder-manager/src/utils/files.test.ts',
  'lib/cli/src/helpers.test.ts',
  'lib/core-server/src/utils/__tests__/server-statics.test.ts',
  'lib/core-common/src/utils/__tests__/template.test.ts',
  'addons/storyshots/storyshots-core/src/frameworks/configure.test.ts',
  'lib/core-common/src/utils/__tests__/interpret-files.test.ts',
  'lib/builder-manager/src/utils/files.test.ts',

• Change the workflow to run the cross-platform tests on every commit in pull requests, as otherwise, we will never keep maintaining this (this action has been failing for 10 months on next).

Ignoring is not perfect, but in this way, we will at least not regress any further on windows.

How to test

• See the passing tests on GitHub action!

[tmeasday]

This is great, thanks @kasperpeulen. We should probably create some tickets to start fixing those tests I guess 🤔

[kasperpeulen]

This is great, thanks @kasperpeulen. We should probably create some tickets to start fixing those tests I guess 🤔

@tmeasday I added a ticket for next cycle, possibly valentine can help us with it, as he has a windows dev machine.