Prepare for 12.4.0~pre1 prerelease

[WilliamLewww]

🎈 Prerelease

Preparation for 12.4.0~pre1 prerelease.

Comparison to 12.3.0: sdformat12_12.3.0...sdformat12

Needed by:

• Triggered Camera gz-sensors#194

Checklist

• Asked team if this is a good time for a release
• There are no changes to be ported from the previous major version
• No PRs targeted at this major version are close to getting in
• Bumped minor for new features, patch for bug fixes
• Updated changelog
• Updated migration guide (as needed)
• Link to PR updating dependency versions in appropriate repository in ignition-release (as needed):

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[chapulina]

Thanks! I just have some comments about cleaning up the changelog.

This release should also help with gazebosim/gz-sim#1333

[WilliamLewww]

Converted to draft to wait for #831 functionality on pre-release.

[codecov-commenter]

Codecov Report

Merging #865 (091869e) into sdf12 (346f3ae) will not change coverage.
The diff coverage is n/a.

❗ Current head 091869e differs from pull request most recent head 1c2ae1f. Consider uploading reports for the commit 1c2ae1f to get more accurate results

@@           Coverage Diff           @@
##            sdf12     #865   +/-   ##
=======================================
  Coverage   88.19%   88.19%           
=======================================
  Files          95       95           
  Lines       14525    14525           
=======================================
  Hits        12811    12811           
  Misses       1714     1714           

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[nkoenig]

Just a reminder that the next sdf12 full release should have this PR in it: #842.

[scpeters]

Just a reminder that the next sdf12 full release should have this PR in it: #842.

this is just a prerelease; we'll check again before making a stable release

[nkoenig]

Just a reminder that the next sdf12 full release should have this PR in it: #842.

this is just a prerelease; we'll check again before making a stable release

Yup, this was just a reminder for the next full sdf12 release.

[adlarkin]

Converted to draft to wait for #831 functionality on pre-release.

#831 has been merged, and I also just realized that we aren't releasing binaries for the USD component yet, so feel free to make the pre-release whenever it's needed 👍