chore(observability): Switch to new SDK structure

[Fyusel]

STACKITTPR-566

Description

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)

[github-actions]

Merging this branch changes the coverage (1 decrease, 1 increase)

Impacted Packages	Coverage Δ	🤖
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability	0.00% (ø)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/alertgroup	33.21% (ø)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/credential	12.00% (ø)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/instance	33.69% (-0.21%)	👎
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/log-alertgroup	34.84% (ø)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/scrapeconfig	39.68% (ø)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/utils	77.78% (ø)
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/utils/planmodifiers/int32planmodifier	46.67% (+46.67%)	🌟

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/alertgroup/datasource.go	0.00% (ø)	39	0	39
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/alertgroup/resource.go	38.86% (ø)	229	89	140
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/credential/resource.go	12.00% (ø)	100	12	88
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/instance/datasource.go	0.00% (ø)	104	0	104
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/instance/resource.go	37.12% (-0.24%)	1021 (+4)	379 (-1)	642 (+5)	👎
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/log-alertgroup/datasource.go	0.00% (ø)	39	0	39
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/log-alertgroup/resource.go	41.46% (ø)	205	85	120
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/scrapeconfig/datasource.go	0.00% (ø)	34	0	34
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/scrapeconfig/resource.go	43.60% (ø)	344	150	194
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/utils/util.go	77.78% (ø)	9	7	2
github.com/stackitcloud/terraform-provider-stackit/stackit/internal/utils/planmodifiers/int32planmodifier/use_state_for_unknown_if.go	46.67% (+46.67%)	30 (+30)	14 (+14)	16 (+16)	🌟

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/observability/alertgroup/resource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/credential/resource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/instance/resource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/log-alertgroup/resource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/observability_acc_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/observability_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/scrapeconfig/resource_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/services/observability/utils/util_test.go
• github.com/stackitcloud/terraform-provider-stackit/stackit/internal/utils/planmodifiers/int32planmodifier/use_state_for_unknown_if_test.go