Update to latest ornl backports version of mantid

[peterfpeterson]

Update to the latest version of mantid from the ornl backports to get rid of vulnerabilities in indirect dependencies. Also removes some pins of things that were fixed in mantid itself.

Unfortunately, mantid-ornl doesn't have packages for things other than linux so osx was removed.

This also copies information from the .git-attributes in the templates repositories to avoid merge conflicts in the pixi.lock file.

Check list for the pull request

• I have read the [CONTRIBUTING]
• I have read the [CODE_OF_CONDUCT]
• I have added tests for my changes
• I have updated the documentation accordingly

Check list for the reviewer

• I have read the [CONTRIBUTING]
• I have verified the proposed changes
• best software practices
  • all internal functions have an underbar, as is python standard
  • clearly named variables (better to be verbose in variable names)
  • code comments explaining the intent of code blocks
• All the tests are passing
• The documentation is up to date
• code comments added when explaining intent

Manual test for the reviewer

This fixes the builds. No other testing should be necessary.