Use SDK constant to check if default auth cannot be configured

[pietern]

Changes

The SDK bump in #2920 required rewriting an error equivalence check to perform string matching because the constant was removed. It was brought back in databricks/databricks-sdk-go#1226.

Tests

Ran tests under cmd/root.

[github-actions]

This PR has not received an update in a while. If you want to keep this PR open, please leave a comment below or push a new commit and auto-close will be canceled.

[eng-dev-ecosystem-bot]

Run: 17262389687

	Env	✅‌pass	🔄‌flaky	🙈‌skip
✅‌	aws linux	308		496
✅‌	aws windows	309		495
🔄‌	aws-ucws linux	416	8	392
✅‌	aws-ucws windows	425		391
✅‌	azure linux	308		495
🔄‌	azure windows	306	3	494
🔄‌	azure-ucws linux	423	1	391
✅‌	azure-ucws windows	425		390
✅‌	gcp linux	307		497
✅‌	gcp windows	308		496

11 failing tests:

Test Name	aws-ucws linux	azure windows	azure-ucws linux
TestAccept	✅‌pass	🔄‌flaky	✅‌pass
TestAccept/bundle/deploy/dashboard/detect-change	🔄‌flaky	✅‌pass	✅‌pass
TestAccept/bundle/deploy/dashboard/generate_inplace	🔄‌flaky	✅‌pass	✅‌pass
TestAccept/bundle/deploy/dashboard/nested-folders	🔄‌flaky	✅‌pass	✅‌pass
TestAccept/bundle/deploy/dashboard/simple	🔄‌flaky	✅‌pass	✅‌pass
TestAccept/bundle/deploy/dashboard/simple_outside_bundle_root	🔄‌flaky	✅‌pass	✅‌pass
TestAccept/bundle/deploy/dashboard/simple_syncroot	🔄‌flaky	✅‌pass	✅‌pass
TestAccept/bundle/templates/default-python/combinations/classic	✅‌pass	🔄‌flaky	✅‌pass
TestAccept/bundle/templates/default-python/combinations/classic/DATABRICKS_CLI_DEPLOYMENT=terraform/DLT=no/NBOOK=yes/PY=yes	✅‌pass	🔄‌flaky	✅‌pass
TestDashboardAssumptions_WorkspaceImport	🔄‌flaky	✅‌pass	🔄‌flaky
TestFetchRepositoryInfoAPI_FromRepo	🔄‌flaky	✅‌pass	✅‌pass