Fully remove part provider and last remaining references

[Mgonzalez-droid]

What's changed?

Remove deprecated code in place for new functionality.

What's your motivation?

#3754 (comment)

Anything in particular you'd like reviewers to focus on?

Is not a complete implementation due to time constraints, will be able to complete any final changes as needed. Not tested with build.

Anyone you would like to review specifically?

@timtebeek

Have you considered any alternatives or workarounds?

N/A

Any additional context

N/A

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[timtebeek]

Thanks for getting this started @Mgonzalez-droid ! Let's try to get this first one through, and then circle back here:

• Fully remove part provider and last remaining references rewrite-migrate-java#401

[timtebeek]

Currently still blocked by

• Fully remove part provider and last remaining references rewrite-spring#478
• Fully remove part provider and last remaining references rewrite-static-analysis#248

[timtebeek]

Thanks for the help in getting this started @Mgonzalez-droid !