Add ovsx

[zFernand0]

Proposed changes

• Update how tokens are handled for VSCode Extension deployments.
• Add the ability to publish directly to Open-VSX

Note:
GH Secret has already been updated

Please merge this PR before the next HotFix or Enhancement.

Release Notes

Milestone: Sprint 3

Changelog: Add Open-VSX to the deployment pipeline

Types of changes

What types of changes does your code introduce to Zowe Explorer?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Updates to Documentation or Tests (if none of the other choices apply)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This checklist will be used as reference for both the contributor and the reviewer

• I have read the CONTRIBUTOR GUIDANCE wiki
• PR title follows Conventional Commits Guidelines
• PR Description is included
• gif or screenshot is included if visual changes are made
• yarn workspace vscode-extension-for-zowe vscode:prepublish has been executed
• All checks have passed (DCO, Jenkins and Code Coverage)
• I have added unit test and it is passing
• I have added integration test and it is passing
• There is coverage for the code that I have added
• I have tested it manually and there are no regressions found
• I have added necessary documentation (if appropriate)
• Any PR dependencies have been merged and published (if appropriate)

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[zFernand0]

To view the already published versions of the extensions:

• Go to https://open-vsx.org and search for zowe OR
• https://open-vsx.org/?search=zowe&category=&sortBy=relevance&sortOrder=desc

And the extensions are:

• https://open-vsx.org/extension/Zowe/vscode-extension-for-zowe
• https://open-vsx.org/extension/Zowe/zowe-explorer-ftp-extension

[zFernand0]

We now have two separate secrets for open vsx and regular marketplace :)
This PR reflects those changes.

[jellypuno]

Should this be compared against 1.13.x?

[phaumer]

Only looked at the code, but obviously cannot test it. I do not know much about this CI framework, but instead of installing vsce and ovsx it might be enough to run them via an npx command.