Add PNPM package manager support

[nartuk]

Related to feature request: RTECO-366

Requires:

• Add PNPM package manager support build-info-go#368
• Add PNPM package manager support jfrog-cli-core#1519
• Add PNPM package manager support jfrog-cli-artifactory#362

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• All tests have passed. If this feature is not already covered by the tests, new tests have been added.
• The pull request is targeting the master branch.
• The code has been validated to compile successfully by running go vet ./....
• The code has been formatted properly using go fmt ./....

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