Fixes to install meta components to GKE with InCluster dependencies

[mrsimonemms]

Description

This follows on from #6323, applying the fixes to the meta components. This now installs a complete self-hosted instance in GKE with InCluster dependencies

• add OpenVSX component
• trigger a DB migration job - as we're not using Helm, have used the DB waiter init container which seems to emulate the post-install/upgrade hook well
• add custom server annotations to each component as per [Installer]: add the number of replicas required for a deployment in the config #6357. The currently self-hosted GKE guide uses external-dns to update CloudDNS, which requires the addition of annotations to the proxy service. I imagine that there will be many users who want their own annotations on services, this seems like a good first step to that - I would advocate that this should just be a passthru as we'll never keep up with the community's requirements otherwise.

Related Issue(s)

Fixes #6276
Fixes #6122

How to test

As per #6323

Release Notes

Successfully install the meta components to a cluster and perform a DB migration

Documentation

[akosyakov]

@corneliusludmann could you review openvsx proxy changes please? 🙏

[csweichel]

Which component actually uses those? Is it worth making them available to all components, considering that once they're present they'll be used?

[mrsimonemms]

Its seems to be used by quite a lot of the meta components as it's pulled in from a TS file. There's a lot of references to installationShortname in the source code as well

[corneliusludmann]

/approve

Code-wise, the change to the OpenVSX proxy looks good so far. Didn't test installing the stuff, though.

[csweichel]

/lgtm

[roboquat]

LGTM label has been added.

Git tree hash: 7278ccf1dc5b8bad034e3b74168ca0ae1cd7dbec

[roboquat]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: corneliusludmann, csweichel

Associated issue: #6323

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• components/openvsx-proxy/OWNERS [corneliusludmann]
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