Finish adding OSGi support

[jack-berg]

Followup to #7964, #8401

Resolves #768

• Add support for autoconfigure / declarative configuration, and corresponding OSGi tests
• Add missing Provides-Capabilities metadata to all artifacts which provide SPI implementations
• Add test asserting that every artifact's Provide-Capabilities from MANIFEST.mf matches the SPIs they advertise in resources/META-INF/services

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.14%. Comparing base (32440c1) to head (780b019).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8417      +/-   ##
============================================
- Coverage     91.14%   91.14%   -0.01%     
- Complexity     7761     7763       +2     
============================================
  Files           881      881              
  Lines         23409    23410       +1     
  Branches       2331     2331              
============================================
  Hits          21337    21337              
  Misses         1377     1377              
- Partials        695      696       +1     

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[jack-berg]

cc @royteeuwen this adds OSGi support for autoconfigure and declarative config