Creating product index to speed up vulnerability scanning (#44910)

**Related issue:** Resolves #44391

# Checklist for submitter

If some of the following don't apply, delete the relevant line.
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.

## Testing
- [x] QA'd all new/changed functionality manually



<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

* **Documentation**
* Added release notes documenting vulnerability scanning performance
improvements

* **Refactor**
* Optimized vulnerability scanning performance through enhanced CVE
product matching efficiency

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

changes/44391-vuln-scan-product-index

@@ -0,0 +1 @@
+* Improved vulnerability scanning performance by using a per-vendor product cache during CVE matching to optimize translate_cpe_to_cve.