Clear new locally created files before pushing a fix

[eranturgeman]

• All tests passed. If this feature is not already covered by the tests, I added new tests.
• This pull request is on the dev branch.
• I used gofmt for formatting the code before submitting the pull request.
• Update documentation about new features / new supported technologies

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This PR improves Frogbot's ability to detect new locally created files, and remove them before pushing the fixes PRs.
This improvement allows Frogbot to push cleaner PRs ,with changes ONLY in the already existing files and not pushing newly created files (like new lock files, node_modules etc...)

[github-actions]

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🐸 JFrog Frogbot