GET/ DELETE /v2/commitments

[wagnerd3]

I will open this branch here as draft, so that the progress does not get lost or cause double work.
I had to switch back to the v2 report PR in the middle of this, so this is not finished.

What has been done:

• I cherry-picked the necessary documentation and types from the v2-commitment-api branch
• implemented DELETE API and tests (IIRC, the tests for this should be mostly complete and have okay coverage)
• did some prep for GET in the form of mock setup for auth etc.

TODO:

• implement GET + tests
• check what the DELETE test covers and whether I missed anything important.

[github-actions]

Merging this branch will increase overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/sapcc/limes/internal/api/api_v2	74.40% (+2.10%)	👍
github.com/sapcc/limes/internal/apideclarations/apiv2	0.00% (ø)
github.com/sapcc/limes/internal/apideclarations/apiv2/common	0.00% (ø)
github.com/sapcc/limes/internal/apideclarations/apiv2/resources	0.00% (ø)
github.com/sapcc/limes/internal/core	80.93% (+0.03%)	👍
github.com/sapcc/limes/internal/test	93.55% (+0.07%)	👍

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/sapcc/limes/internal/api/api_v2/commitment_create.go	86.17% (ø)	752	648	104
github.com/sapcc/limes/internal/api/api_v2/commitment_delete.go	89.19% (+89.19%)	296 (+296)	264 (+264)	32 (+32)	🌟
github.com/sapcc/limes/internal/api/api_v2/commitment_helpers.go	95.52% (+0.44%)	536 (+48)	512 (+48)	24	👍
github.com/sapcc/limes/internal/api/api_v2/core.go	88.37% (+0.21%)	688 (+80)	608 (+72)	80 (+8)	👍
github.com/sapcc/limes/internal/apideclarations/apiv2/common/opts.go	0.00% (ø)	0	0	0
github.com/sapcc/limes/internal/apideclarations/apiv2/common/types.go	0.00% (ø)	42 (+42)	0	42 (+42)
github.com/sapcc/limes/internal/apideclarations/apiv2/doc.go	0.00% (ø)	0	0	0
github.com/sapcc/limes/internal/apideclarations/apiv2/resources/commitment.go	0.00% (ø)	0	0	0
github.com/sapcc/limes/internal/core/service_info_cache.go	85.84% (-0.00%)	1864 (+56)	1600 (+48)	264 (+8)	👎
github.com/sapcc/limes/internal/test/mock_enforcer.go	93.10% (+0.51%)	232 (+16)	216 (+16)	16	👍
github.com/sapcc/limes/internal/test/setup.go	92.48% (ø)	1064	984	80

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/sapcc/limes/internal/api/api_v2/commitment_delete_test.go
• github.com/sapcc/limes/internal/core/service_info_cache_test.go