Add provider compatibility to the runtime service

[renier]

Summary

Adds provider compatibility to the runtime service. This allows us to pass the
runtime service to those algorithm classes that expect a base provider to call
provider.runtime.run(...) on, without needing upstream changes.

[coveralls]

Pull Request Test Coverage Report for Build 2826326303

• 4 of 6 (66.67%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 62.649%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit_ibm_runtime/qiskit_runtime_service.py	4	6	66.67%

Totals
Change from base Build 2815089434:	0.2%
Covered Lines:	2900
Relevant Lines:	4629

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💛 - Coveralls

[rathishcholarajan]

@renier Even though this looks harmless to merge, it was done from the point of view of fixing a bug. We need to think about this a bit more as part of a larger Epic.

Also usually when contributing to this repo it is recommended to fork this repo, work on a branch and then open a PR. That way PR builds won't run all integration tests and fail sometimes, but just the unit tests, which are enough to merge. People usually add their personal environment secrets to their fork as explained in the contribution guidelines and that way we know if integration tests pass on your fork, before merging.

[renier]

@renier Even though this looks harmless to merge, it was done from the point of view of fixing a bug. We need to think about this a bit more as part of a larger Epic.

Yes, let's take time to discuss this first.

Also usually when contributing to this repo it is recommended to fork this repo, work on a branch and then open a PR. That way PR builds won't run all integration tests and fail sometimes, but just the unit tests, which are enough to merge. People usually add their personal environment secrets to their fork as explained in the contribution guidelines and that way we know if integration tests pass on your fork, before merging.

Ok, I admit I didn't read the guidelines. Will do that in the future.

[renier]

@stefan-woerner any objections to this?

[renier]

@kt474 if you have no objections, please merge.