General JavaScript module update

[rudolf101]

Description

The JavaScript module has received a series of improvements:

• Moved to a new fuzzer platform
• Added cancellation of fuzzing if something goes wrong
• Refactored coverage service
• Improved operation for different operating systems when installing and checking npm packages
• Improved text for generated tests, e.g:

How to test

Manual tests

Various scenarios have been tested. You can find the examples in the folder `/utbot-js/samples' and try to run UTBot.

Self-check list

• I've set the proper labels for my PR (at least, for category and component).
• PR title and description are clear and intelligible.
• I've added enough comments to my code, particularly in hard-to-understand areas.
• The functionality I've repaired, changed or added is covered with automated tests.
• Manual tests have been provided optionally.
• The documentation for the functionality I've been working on is up-to-date.