fix(bitbucket-server): Fix retrival of config files with oneline json5 comments

[agriessbosch]

Changes

When retrieving rawFiles from bitbucket server (presets or other files), the retrieved lines are now concatenated with new line characters.

Context

• Closes #17321

Documentation (please check one with an [x])

• [ ] I have updated the documentation, or
• [x] No documentation update is required

How I've tested my work (please tick one)

I have verified these changes via:

• [ ] Code inspection only, or
• [x] Newly added/modified unit tests, or
• [ ] No unit tests but ran on a real repository, or
• [ ] Both unit tests + ran on a real repository