Increase parallelism in smoketest yaml + reduce iterations in PR

[grvillic]

Context

We have seen these smoke test runs take forever to be provisioned. I increased parallelism + reduce number of dotnet scans in PR builds to make them finish faster and made them skip execution for draft PRs.

[Copilot]

Pull request overview

This PR updates the smoke-test GitHub Actions workflow to reduce provisioning/runtime overhead by increasing job parallelism and reducing repeated scan iterations for non-scheduled runs, while also skipping execution for draft PRs.

Changes:

• Add PR path filtering and skip draft PR executions for the smoke-test job.
• Increase matrix job parallelism from 4 to 6.
• Reduce scan loop iterations to 1 for non-scheduled runs (keeping 10 for scheduled runs).

Show a summary per file

File	Description
.github/workflows/smoke-test.yml	Tweaks workflow triggers/conditions, increases matrix parallelism, and adjusts iteration count to speed up PR smoke test runs.

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 2

[Copilot]

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 3

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.0%. Comparing base (bcf8390) to head (e67338e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@     Coverage Diff      @@
##   main   #1792   +/-   ##
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