[server] Ensure incremental prebuilds always use the latest config

[jankeromnes]

Description

Ensure Incremental Prebuilds always use the latest config (by always overwriting the parent prebuild's config with the most-recently fetched config).

From the in-line comment:

createForPrebuiltWorkspace 1:1 copies the config from the parent prebuild.
Above, we've made sure that the parent's prebuild tasks (before/init/prebuild) are still the same as now.
However, other non-prebuild config items might be outdated (e.g. any command task, VS Code extension, ...)
To fix this, we overwrite the new prebuild's config with the most-recently fetched config.

Related Issue(s)

Fixes #7475

How to test

See "Steps to reproduce" in #7475

Release Notes

[server] Ensure incremental prebuilds always use the latest config

Documentation

[codecov]

Codecov Report

Merging #7805 (368ce85) into main (e335309) will decrease coverage by 0.17%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #7805      +/-   ##
==========================================
- Coverage   10.38%   10.20%   -0.18%     
==========================================
  Files          18       18              
  Lines         992     1009      +17     
==========================================
  Hits          103      103              
- Misses        888      905      +17     
  Partials        1        1              

Flag	Coverage Δ
components-gitpod-cli-app	10.20% <0.00%> (-0.18%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
components/gitpod-cli/cmd/credential-helper.go	1.20% <0.00%> (-0.14%)	⬇️

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[JanKoehnlein]

LGTM

[roboquat]

LGTM label has been added.

Git tree hash: 8e752d9f45bfd1bbedbd428e3ba47ee9d7403561

[roboquat]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JanKoehnlein

Associated issue: #7475

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• components/server/OWNERS [JanKoehnlein]

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