build: Integrate to use PA and GAP assets if available

[pvijayakrish]

What does the PR do?

Reuse the PA build assets if available.

Expected behavior:

• When TRITON_PERF_ANALYZER_BUILD=0, the build expects PA assets to be available in the path specified by TRITON_PA_REPO_SUBDIR.
• By default, TRITON_PERF_ANALYZER_BUILD=1, in which case PA is built from source.

Ref: ticket 718.

Checklist

• PR title reflects the change and is of format <commit_type>: <Title>
• Changes are described in the pull request.
• Related issues are referenced.
• Populated github labels field
• Added test plan and verified test passes.
• Verified that the PR passes existing CI.
• Verified copyright is correct on all changed files.
• Added succinct git squash message before merging ref.
• All template sections are filled out.
• Optional: Additional screenshots for behavior/output changes with before/after.

Commit Type:

Check the conventional commit type
box here and add the label to the github PR.

• build
• ci
• docs
• feat
• fix
• perf
• refactor
• revert
• style
• test

[nv-kmcgill53]

nit: built not build

[nv-kmcgill53]

There is likely a better structure for these changes, but I am not seeing it right now with how the Triton Organization divided. I will talk with the Triton Tools team to understand long term plans better. I am approving this understanding that it might have to change later.