Add DxSqlAg Chart

[ian-buse]

This PR adds the DxSqlAg chart.

dh2i/dxsqlag:
- 1.0.0

References

• Example Workflow for Adding a Package
• How do I verify my pull request is correct?

Checklist

Check	Expected	Details
.tgz archive	assets/<vendor>/<chartname>-<version>.tgz	How do I verify my pull request is correct?
Icon	assets/icons/<chartname>.<ext>	How do I verify my pull request is correct? · How do I change the icon?
Chart source	charts/<vendor>/<chart>/<version>/ directory	Generated by running scripts/pull-scripts then PACKAGE=<vendor>/<chart> bin/partner-charts-ci update. Reference
Chart.yaml	charts/<vendor>/<chart>/<version>/Chart.yaml	Must contain catalog.cattle.io/* annotations. How do I verify my pull request is correct?
Package definition	packages/<vendor>/<chart>/upstream.yaml	Present and configured correctly. Reference
App readme	packages/<vendor>/<chart>/overlay/app-readme.md	Present, 1-2 paragraphs. Reference
Single Package	Only files for one <vendor>/<chart> touched	PRs touching multiple packages will be rejected. Reference
Index updated	index.yaml has additions	Generated by the tool. Must not have the generated: timestamp modified. How do I verify my pull request is correct?
Not manually edited	charts/ and assets/ were not manually edited	These are generated files. Always delete and regenerate them by re-running bin/partner-charts-ci update. Reference