Additions to support Pnpm in frogbot

[eranturgeman]

• The pull request is targeting the dev branch.
• The code has been validated to compile successfully by running go vet ./....
• The code has been formatted properly using go fmt ./....
• All static analysis checks passed.
• All tests have passed. If this feature is not already covered by the tests, new tests have been added.
• All changes are detailed at the description. if not already covered at JFrog Documentation, new documentation have been added.

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This pull request implements modifications to the Pnpm audit flow in order to facilitate Frogbot's PNPM support. When auditing a Pnpm project and performing the 'install' operation, a node_modules directory is generated, which becomes redundant after the dependency calculation. Thus, we remove it if it didn't exist previously, ensuring no residual trace is left behind from the 'install' action.

[github-actions]

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