feat(sfs): add labels to sfs resources

[Manuelvaas]

Description

relates to STACKITTPR-525

Checklist

• Issue was linked above
• Code format was applied: make fmt
• Examples were added / adjusted (see examples/ directory)
• Docs are up-to-date: make generate-docs (will be checked by CI)
• Unit tests got implemented or updated
• Acceptance tests got implemented or updated (see e.g. here)
• Unit tests are passing: make test (will be checked by CI)
• No linter issues: make lint (will be checked by CI)

[marceljk]

When setting labels to an empty map or null for an update, the update results in an state drift because in the api the labels aren't removed. The reason is, that conversion.ToOptStringMap(modelLabels) returns a nil pointer and not an empty map in case the length == 0. This results in different payloads.

Please cover your fix also by an unit test in TestToUpdatePayload(), to ensure an correct behavior in the future

[github-actions]

Merging this branch will increase overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs	0.00% (ø)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/export-policy	20.59% (+2.31%)	👍
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/resourcepool	21.69% (+2.86%)	👍
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/share	15.29% (+3.56%)	👍
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/validate	97.12% (+0.03%)	👍

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/export-policy/datasource.go	0.00% (ø)	47	0	47
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/export-policy/resource.go	24.32% (+2.51%)	259 (+16)	63 (+10)	196 (+6)	👍
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/resourcepool/datasource.go	32.93% (+1.85%)	82 (+8)	27 (+4)	55 (+4)	👍
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/resourcepool/resource.go	18.00% (+3.04%)	250 (+16)	45 (+10)	205 (+6)	👍
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/share/datasource.go	25.33% (+2.95%)	75 (+8)	19 (+4)	56 (+4)	👍
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/share/resource.go	12.13% (+3.61%)	239 (+16)	29 (+10)	210 (+6)	👍
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/validate/labels.go	100.00% (+100.00%)	1 (+1)	1 (+1)	0	🌟

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/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/export-policy/resource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/resourcepool/datasource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/resourcepool/resource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/sfs_acc_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/share/datasource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/sfs/share/resource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/validate/labels_test.go

[github-actions]

This PR was marked as stale after 7 days of inactivity and will be closed after another 7 days of further inactivity. If this PR should be kept open, just add a comment, remove the stale label or push new commits to it.