Modify SUPReMM Dataflow REST Endpoint

[thanickcruz]

Description

• Modified query strings to return info on available jobs and total jobs together, rather than the percentage.
• Removed hardcoded columns in GPU query

Motivation and Context

• The precise values for available and total jobs conveys more information than just percentage.
• Hardcoded columns in GPU query only applied to CCR systems, had to remove them for generality.

Tests performed

Tested various date ranges on every type on my metrics-dev port to make sure response was valid.

Types of changes

• 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)

Checklist:

• My code follows the code style of this project as found in the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.