Prepare for 7.2.0 release

[iche033]

🎈 Release

Preparation for 7.2.0 release.

Comparison to 7.1.0: gz-sensors7_7.1.0...prep_7.2.0

Needed by gazebosim/gz-sim#1960

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 gazebo-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.

[codecov]

Codecov Report

Merging #341 (588eb53) into gz-sensors7 (d412d9d) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           gz-sensors7     #341   +/-   ##
============================================
  Coverage        70.02%   70.02%           
============================================
  Files               36       36           
  Lines             3926     3926           
============================================
  Hits              2749     2749           
  Misses            1177     1177           

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