[Whitelabel/branding] Support using alternate container for vsix-installer; use released versions

[nickboldt]

Describe the bug

As of 7.35, che-theia hardcodes the URL for the vsix-installer as quay.io/eclipse/che-theia-vsix-installer:next.

This is neither updated in the 7.35.x branch to point to a stable release like 7.35.0, nor is it exposed to the downstream productization process as a parameter that can easily be replaced by a different, more stable, product image.

Che version

next (development version)

Steps to reproduce

1. Open this file https://github.com/eclipse-che/che-theia/blob/7.35.x/tools/devworkspace-handler/src/vsix-installer/vsix-installer-component-updater.ts#L33
2. see line 33

Expected behavior

There should be a better way to change this value from a hardcoded :next build to a stable one

Che release process should replace :next with a real released version.

Downstream builds should have a way to whitelabel/rebrand/replace this image.

Runtime

Kubernetes (vanilla), OpenShift

Screenshots

No response

Installation method

other (please specify in additional context)

Environment

other (please specify in additional context)

Eclipse Che Logs

No response

Additional context

No response

[dmytro-ndp]

It's needed for DevWorkspace support in CRW 2.11+

[azatsarynnyy]

I'm closing it as we've got rid of vsix-installer separate image in eclipse-che/che-theia#1222