Remove provider lookup from core #16756

Description:

This should be done in the provider plugin instead.

requires https://github.com/matomo-org/plugin-Provider/pull/7
fixes #16712

The Provider plugin submodule needs to be updated before merge (after the plugin PR was merged)

Review

• [ ] Functional review done
• [ ] Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• [ ] Security review done see checklist
• [ ] Code review done
• [ ] Tests were added if useful/possible
• [ ] Reviewed for breaking changes
• [ ] Developer changelog updated if needed
• [ ] Documentation added if needed
• [ ] Existing documentation updated if needed