Add roles to common metadata

[tylanderson]

Related Issue(s):

• Move roles up out of Assets and Providers and into common metadata #1378

Description:

Move roles to common metadata for STAC spec 1.1.0

PR Checklist:

• Pre-commit hooks and tests pass (run scripts/test)
• Documentation has been updated to reflect changes, if applicable
• This PR maintains or improves overall codebase code coverage.
• Changes are added to the CHANGELOG. See the docs for information about adding to the changelog.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.21%. Comparing base (ba406cb) to head (0e540d3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1444   +/-   ##
=======================================
  Coverage   91.21%   91.21%           
=======================================
  Files          52       52           
  Lines        7237     7243    +6     
  Branches     1018     1018           
=======================================
+ Hits         6601     6607    +6     
  Misses        457      457           
  Partials      179      179           

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