[rebuild] support desktop IDEs

[akosyakov]

Description

This PR enables support of VS Code Desktop and JB product in workspaces started by gp rebuild.

Related Issue(s)

Fixes #

How to test

• Download the JB GW plugin build related to this branch in Dev Versions, and install it on the Gateway.
  • You can also uninstall current Gitpod plugin, configure dev channel using https://plugins.jetbrains.com/plugins/list?channel=dev&pluginId=18438-gitpod-gateway and restart GW to test that the proper version is detected and installed.
• Ensures to upgrade Gitpod extension in VS Code Desktop to latest version.
• Start a workspace with VS Code Desktop or IntelliJ.
• Confirm that usual flow works.
  • VS Code Desktop
  • IntelliJ
• Now start a workspace with gp rebuild and confirm that such flow works as well.
  • VS Code Desktop
  • IntelliJ

Release Notes

NONE

Documentation

Build Options:

• /werft with-werft
  Run the build with werft instead of GHA
• leeway-no-cache
• /werft no-test
  Run Leeway with --dont-test

Publish Options

• /werft publish-to-npm
• /werft publish-to-jb-marketplace

Installer Options

• with-ee-license
• with-dedicated-emulation
• with-ws-manager-mk2
• workspace-feature-flags
  Add desired feature flags to the end of the line above, space separated

Preview Environment Options:

• /werft with-local-preview
  If enabled this will build install/preview
• /werft with-preview
• /werft with-large-vm
• /werft with-gce-vm
  If enabled this will create the environment on GCE infra
• /werft with-integration-tests=all
  Valid options are all, workspace, webapp, ide, jetbrains, vscode, ssh

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[akosyakov]

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