AIR CLI Integration: remove requirements file path for config

[riddhibhagwat-db]

Changes & Why

environment.dependencies now accepts only an inline list of packages. The string form (a path to a requirements.yaml file) is rejected at config load, now that inline deps are fully supported (#6077).

Removes the file-reading paths (readRequirementsDependencies, requirementsDoc, requirementsFile) and the file-vs-inline branching in run submit and convert-to-dabs; the dependencies union collapses to a plain list.

Tests

• TestLoadRunConfig_PolymorphicFields: requirements.yaml fails at load with must be a list of packages
• Acceptance rejection case: end-to-end proof the CLI rejects the file-path form with the actionable error message, captured verbatim in output.txt.
• TestRunConfigDependencies: the inline list still decodes and is returned by inlineDependencies(); unset returns false.
• TestLoadRunConfig_FullFeatured: a full config with an inline dependencies: list parses into Dependencies.{set, list} correctly.
• TestBuildSubmitPayloadInlineDependencies: inline deps are carried on environments[].spec.dependencies in the submit payload (empty/nil omit the key).
• Acceptance inline happy path: a real submit uploads only command.sh + training_config.yaml (no requirements.yaml) and the recorded runs/submit body carries the deps inline.
• TestBuildArtifacts_ParametersButNoRequirements: inline deps are not written as an uploaded artifact.
• TestEnvironmentConfigValidate: environment.version is valid only alongside inline deps (the old file-deps branch is gone).
• Full-featured convert test: the convert-to-dabs path folds inline deps + version into the bundle environments[].spec, proving both consumers stay in lockstep on the inline-only path.

Manual Verification:

Rejected:

Accepted:

[github-actions]

Approval status: pending

/acceptance/experimental/air/ - needs approval

5 files changed
Suggested: @vinchenzo-db
Also eligible: @apeforest, @bfontain, @lu-wang-dl, @panchalhp-db, @maggiewang-db, @ben-hansen-db, @pardis-beikzadeh-db

/experimental/air/ - needs approval

8 files changed
Suggested: @vinchenzo-db
Also eligible: @apeforest, @bfontain, @lu-wang-dl, @panchalhp-db, @maggiewang-db, @ben-hansen-db, @pardis-beikzadeh-db

_{Any maintainer (@andrewnester, @anton-107, @denik, @pietern, @shreyas-goenka, @simonfaltum, @renaudhartert-db, @janniklasrose, @lennartkats-db) can approve all areas.
See OWNERS for ownership rules.}

[eng-dev-ecosystem-bot]

Integration test report

Commit: 705d64f

Run: 31625053421

	Env	💚​RECOVERED	🙈​SKIP	✅​pass	🙈​skip	Time
💚​	aws linux	4	4	291	1104	8:19
💚​	aws windows	4	4	293	1102	6:28
💚​	azure linux	4	4	290	1104	8:58
💚​	azure windows	4	4	292	1102	6:45
💚​	gcp linux	1	5	291	1104	8:50
💚​	gcp windows	1	5	293	1102	9:00

8 interesting tests: 4 RECOVERED, 4 SKIP

	Test Name	aws linux	aws windows	azure linux	azure windows	gcp linux	gcp windows
💚​	TestAccept	💚​R	💚​R	💚​R	💚​R	💚​R	💚​R
🙈​	TestAccept/bundle/invariant/no_drift	🙈​S	🙈​S	🙈​S	🙈​S	🙈​S	🙈​S
🙈​	TestAccept/bundle/resources/vector_search_endpoints/drift/recreated_same_name	🙈​S	🙈​S	🙈​S	🙈​S	🙈​S	🙈​S
🙈​	TestAccept/bundle/resources/vector_search_indexes/recreate/embedding_dimension	🙈​S	🙈​S	🙈​S	🙈​S	🙈​S	🙈​S
🙈​	TestAccept/ssh/connection	🙈​S	🙈​S	🙈​S	🙈​S	🙈​S	🙈​S
💚​	TestFetchRepositoryInfoAPI_FromRepo	💚​R	💚​R	💚​R	💚​R	🙈​S	🙈​S
💚​	TestFetchRepositoryInfoAPI_FromRepo/root	💚​R	💚​R	💚​R	💚​R
💚​	TestFetchRepositoryInfoAPI_FromRepo/subdir	💚​R	💚​R	💚​R	💚​R

Top 8 slowest tests (at least 2 minutes):

duration	env	testname
8:10	gcp windows	TestAccept
6:03	azure windows	TestAccept
5:57	aws windows	TestAccept
2:54	azure linux	TestAccept
2:54	aws linux	TestAccept
2:53	gcp linux	TestAccept
2:31	gcp windows	TestFilerWorkspaceFilesExtensionsRead
2:06	gcp windows	TestFilerReadWrite/workspace_files_extensions

[vinchenzo-db]

I think this is ok but please have Ben review this one