chore(release): bump version to v1.2.4 and update release notes

[jaellio]

• [x] I have cherry-picked any changes labelled needs-cherry-pick-vX.Y.Z

• [x] I have made all of the following version and patch updates:

  1. Updated the container image tag in charts/osm/values.yaml
  2. Updated the chart and app version in charts/osm/Chart.yaml
  3. Updated the image tags used in the automated demo
  4. Regenerated the Helm chart README.md

• [x] I have checked that the base branch for this PR is correct as defined by the release guide

Is this a release candidate?

[codecov-commenter]

Codecov Report

Merging #5330 (6dff016) into release-v1.2 (e156008) will decrease coverage by 0.02%. The diff coverage is n/a.

:mega: This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

@@               Coverage Diff                @@
##           release-v1.2    #5330      +/-   ##
================================================
- Coverage         68.76%   68.75%   -0.02%     
================================================
  Files               210      210              
  Lines             15693    15693              
================================================
- Hits              10791    10789       -2     
- Misses             4851     4853       +2     
  Partials             51       51              

Flag	Coverage Δ
unittests	68.75% <ø> (-0.02%)	:arrow_down:

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

see 1 file with indirect coverage changes

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.