feat: monorepo setup for lifecycle-operator, scheduler and runtimes

[mowies]

This PR

• fixes Rename function-runtime folder to deno-runtime #1710
  • renames functions-runtime to deno-runtime
  • moves runtimes into the runtimes sub-folder
• fixes Monorepo setup for lifecycle operator #1598
• creates more monorepo artifacts:
  • lifecycle-operator
  • deno-runtime
  • python-runtime
  • scheduler
• groups lifecycle-operator and scheduler artifacts together into one release PR
• removes k8s manifests from being released (to test the full thing, separate PR chore: remove generation of KLT manifest releases #1850 is open and on hold until KLT 0.8.2 is released)
• fixes a wrong link to a docs snippet in the readme and removes the now unneeded docs snippet
• updates the installation docs to point out that the manifests are no longer supported (debatable if this is needed since manifests will be supported, just differently in the future)
• removes most release-please annotation comments since most things are their own releases now

Notes

I left some comments on the PR to explain things.
Integration tests are failing because they reference files that don't exist on main branch yet.
Same with link checks.

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[codecov]

Codecov Report

Merging #1857 (a5fab48) into main (972b3bb) will decrease coverage by 0.03%.
Report is 2 commits behind head on main.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1857      +/-   ##
==========================================
- Coverage   83.94%   83.91%   -0.03%     
==========================================
  Files         142      142              
  Lines        8817     8845      +28     
==========================================
+ Hits         7401     7422      +21     
- Misses       1152     1157       +5     
- Partials      264      266       +2     

see 1 file with indirect coverage changes

Flag	Coverage Δ
certificate-operator	68.55% <ø> (ø)
component-tests	59.07% <ø> (+0.20%)	⬆️
keptn-lifecycle-operator	?
lifecycle-operator	84.92% <ø> (ø)
metrics-operator	85.40% <ø> (-0.17%)	⬇️
scheduler	32.12% <ø> (ø)

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

[RealAnna]

I think in the example folder and in the samples we sometimes use reference to raw git url to the sample runtimes, can you make sure those are correct ?

for example https://github.com/mowies/lifecycle-controller/blob/main/lifecycle-operator/config/samples/function_execution/taskdefinition_function_upstream.yaml

[StackScribe]

Approving for docs changes. One tiny note for consideration but not a blocker

[thisthat]

blocking 'till release

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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