Update options docstring

[jyu00]

Summary

Update the docstrings for options classes:

• Add defaults if missing
• Indicate if the class applies to V1 and/or V2 primitives
• Fix SamplerV2 execution options pointing to the wrong class
• SamplerExecutionOptionsV2 does not list the attributes under Args, which is rather nice because the attributes are not listed twice in the docs. I changed ExecutionOptionsV2 to use the same style so SamplerExecutionOptionsV2 renders properly (since it inherits from ExecutionOptionsV2), but we should convert all of them.

Details and comments

Fixes #

[coveralls]

Pull Request Test Coverage Report for Build 9568040946

Details

• 13 of 13 (100.0%) changed or added relevant lines in 10 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.007%) to 82.311%

---

Totals
Change from base Build 9568032754:	0.007%
Covered Lines:	6040
Relevant Lines:	7338

---

💛 - Coveralls