Rename the python library as gz.math7

[j-rivero]

🦟 Bug fix

Summary

Allow side-by-side installations of python bindings by renaming the library to include the version in the name. From ignition.math or gz.math to gz.math7.

Particularly, the current approach is causing problems since it conflicts with gz-math6 bindings since both install in ignition/math path in the filesystem. This is blocking the installation of Fortress + Garden side-by-side.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)

[codecov]

Codecov Report

Merging #503 (cbcb910) into gz-math7 (3f63e1f) will not change coverage.
The diff coverage is n/a.

❗ Current head cbcb910 differs from pull request most recent head 141c7b7. Consider uploading reports for the commit 141c7b7 to get more accurate results

@@            Coverage Diff            @@
##           gz-math7     #503   +/-   ##
=========================================
  Coverage     99.70%   99.70%           
=========================================
  Files            77       77           
  Lines          7007     7007           
=========================================
  Hits           6986     6986           
  Misses           21       21           

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[scpeters]

we'll need to make a prerelease after this is merged and update downstream python bindings in sdformat

[peci1]

It's definitely good to have the option to select the particular version. However, what is the maintenance plan for this? If there is no way for downstream code to use some convenience like import gz.math, maintaining 3rd-party (and even 1st-party) code would become a nightmare...