feat(metrics): add downloadIntelligenceModelsReqResp to latency metrics

[maxinteger]

COMPLETES SPARK-503933

This pull request addresses

Implement new downloadIntelligenceModelsReqResp latency for CA metrics

by making the following changes

Updated the types and added new utility function called accumulateLatency

Change Type

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation update
• [ ] Tooling change
• [ ] Internal code refactor

The following scenarios where tested

< ENUMERATE TESTS PERFORMED, WHETHER MANUAL OR AUTOMATED >

I certified that

• [x] I have read and followed contributing guidelines

• [ ] I discussed changes with code owners prior to submitting this pull request

• [ ] I have not skipped any automated checks

• [ ] All existing and new tests passed

• [ ] I have updated the documentation accordingly

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Make sure to have followed the contributing guidelines before submitting.

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[maxinteger]

@torgeadelin I think the linting is coming from a recently merged PR, there is not too many and all related to metrics plugin so I think it is OK

[maxinteger]

@shnaaz I just updated my branch to the latest beta and run formatting, probably these lines where not correctly formatted.

I can roll it back if you want to.