air: Map priority and UC image in DAB conversion

[caroline-db]

Changes

• Map AIR priority and Unity Catalog image settings in air convert-to-dabs.
• Keep the existing pool_id to provisioned_capacity_id mapping and add focused conversion coverage.

Why

• Follow the Go SDK update that introduced typed AIR priority, provisioned-capacity, and Unity Catalog image fields so converted bundles match air run semantics.

Tests

• Added unit and acceptance coverage, including bundle schema validation.
• Ran the AIR test suite, full CLI test suite, checks, formatting, and lint.
• Verified pool priority and Unity Catalog custom-image workloads end to end in staging.

This PR was written by Codex.

[eng-dev-ecosystem-bot]

Integration test report

Commit: a29d0c1

Run: 36903027894

	Env	✅​pass	🙈​skip	Time
✅​	aws linux	276	16	5:25
✅​	aws windows	278	14	3:11
✅​	azure linux	275	16	6:00
✅​	azure windows	277	14	3:24
✅​	gcp linux	276	16	5:57
✅​	gcp windows	278	14	3:03

Top 5 slowest tests (at least 2 minutes):

duration	env	testname
3:56	azure linux	TestAccept
3:47	gcp linux	TestAccept
3:40	aws linux	TestAccept
2:55	gcp windows	TestAccept
2:06	aws windows	TestAccept