Make bundle command error more actionable if run without databricks.yml

[janniklasrose]

Add a hint to bundle commands to run bundle init or change directory since databricks.yml wasn't found.

[github-actions]

Approval status: pending

/acceptance/bundle/ - needs approval

Files: acceptance/bundle/run/inline-script/no-bundle/output.txt, acceptance/bundle/run/inline-script/no-separator/output.txt
Suggested: @pietern
Also eligible: @denik, @shreyas-goenka, @andrewnester, @anton-107, @lennartkats-db

/bundle/ - needs approval

Files: bundle/root.go
Suggested: @pietern
Also eligible: @denik, @shreyas-goenka, @andrewnester, @anton-107, @lennartkats-db

General files (require maintainer)

Files: .nextchanges/bundles/warn-for-missing-databricks-yml.md
Based on git history:

• @pietern -- recent work in bundle/

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

[eng-dev-ecosystem-bot]

Integration test report

Commit: 3d0bfe2

Run: 29567734608

	Env	💚​RECOVERED	🙈​SKIP	✅​pass	🙈​skip	Time
💚​	aws linux	4	4	227	1119	4:40
💚​	aws windows	4	4	229	1117	9:04
💚​	aws-ucws linux	4	4	316	1035	5:40
💚​	aws-ucws windows	4	4	318	1033	9:40
💚​	azure linux	4	4	227	1118	4:55
💚​	azure windows	4	4	229	1116	8:59
💚​	azure-ucws linux	4	4	318	1032	7:53
💚​	azure-ucws windows	4	4	320	1030	7:45
💚​	gcp linux	4	4	226	1120	4:53
💚​	gcp windows	4	4	228	1118	8:57

8 interesting tests: 4 RECOVERED, 4 SKIP

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

Top 10 slowest tests (at least 2 minutes):

duration	env	testname
8:38	aws windows	TestAccept
8:36	aws-ucws windows	TestAccept
8:33	azure windows	TestAccept
8:29	gcp windows	TestAccept
6:26	azure-ucws windows	TestAccept
3:03	azure linux	TestAccept
2:56	gcp linux	TestAccept
2:55	aws-ucws linux	TestAccept
2:53	azure-ucws linux	TestAccept
2:49	aws linux	TestAccept