Patch neg eps bug and add test for each accountant

[eddiestudies]

Types of changes

Minimal clamping change to avoid returning negative epsilon values(rdp, prv) or failing(gdp)

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Docs change / refactoring / dependency upgrade

Motivation and Context / Related issue

Issue was raised 585 for prv.
Adds a clamp to avoid negative epsilons for rdp and prv. rdp had a similar negative epsilon issue.
gdp failed because brentq did not find a sign change between [0, 500].

How Has This Been Tested (if it applies)

I added a test that previously failed for the three accountants.

Checklist

• The documentation is up-to-date with the changes I made.
• I have read the CONTRIBUTING document and completed the CLA (see CONTRIBUTING).
• All tests passed, and additional code has been covered with new tests.

[meta-codesync]

This pull request has been imported. If you are a Meta employee, you can view this in D116482979. (Because this pull request was imported automatically, there will not be any future comments.)