[installer]: correct the stored config to include apiVersion

[mrsimonemms]

Description

The stored config was missing the apiVersion so was an invalid config. This also changes the format from JSON to YAML

This is useful when getting support bundles from KOTS so we can see the stored config to help with debugging

How to test

Deploy via the Installer and get the gitpod configmap

Release Notes

[installer]: correct the stored config to include apiVersion

Documentation

[codecov]

Codecov Report

Merging #8527 (7731d8b) into main (05217c7) will decrease coverage by 1.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #8527      +/-   ##
==========================================
- Coverage   12.31%   11.17%   -1.14%     
==========================================
  Files          20       18       -2     
  Lines        1161      993     -168     
==========================================
- Hits          143      111      -32     
+ Misses       1014      880     -134     
+ Partials        4        2       -2     

Flag	Coverage Δ
components-gitpod-cli-app	11.17% <ø> (ø)
components-local-app-app-darwin-amd64	?
components-local-app-app-darwin-arm64	?
components-local-app-app-linux-amd64	?
components-local-app-app-linux-arm64	?
components-local-app-app-windows-386	?
components-local-app-app-windows-amd64	?
components-local-app-app-windows-arm64	?

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Impacted Files	Coverage Δ
components/local-app/pkg/auth/pkce.go
components/local-app/pkg/auth/auth.go

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