fix: handle breaking changes in frontend for "workspaces by provider" endpoint

[alex-mcgovern]

In stacklok/codegate#1233 I made a breaking change — GET /api/v1/workspaces/:provider_id was already in use for listing providers in use by a workspace, but now will return a full workspace by name. (GET /api/v1/workspaces/:provider_id).

The old functionality can be achieved with GET /api/v1/workspaces?provider_id={ID} now instead — this PR wires that up for the frontend.

[coveralls]

Pull Request Test Coverage Report for Build 13694811223

Details

• 23 of 62 (37.1%) changed or added relevant lines in 3 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-1.4%) to 68.5%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/features/providers/hooks/use-confirm-delete-provider.tsx	0	1	0.0%
src/api/generated/sdk.gen.ts	7	14	50.0%
src/api/generated/@tanstack/react-query.gen.ts	16	47	34.04%

Files with Coverage Reduction	New Missed Lines	%
src/features/providers/hooks/use-confirm-delete-provider.tsx	1	0.0%

Totals
Change from base Build 13678205283:	-1.4%
Covered Lines:	898
Relevant Lines:	1246

---

💛 - Coveralls

[alex-mcgovern]

Superseded by #379