fix(objectstorage): check service enablement only if service call fails

[SerseusWasTaken]

Description

Changes CLI behavior to only check if the object-storage service is available in the given project if the initial service call fails.
Also added service enablement checks to list and create commands that were missing them.

relates to STACKITCLI-426

Checklist

• Issue was linked above
• Code format was applied: make fmt
• Examples were added / adjusted (see e.g. here)
• Docs are up-to-date: make generate-docs (will be checked by CI)
• Unit tests got implemented or updated
• 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 will decrease overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/bucket/create	41.67% (ø)
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/bucket/list	38.89% (-3.97%)	👎
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/compliance-lock/describe	53.85% (ø)
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/compliance-lock/lock	35.71% (ø)
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/compliance-lock/unlock	27.03% (ø)
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/credentials-group/create	50.00% (-6.76%)	👎
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/credentials-group/list	56.25% (-6.54%)	👎
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/credentials/create	53.57% (-5.25%)	👎
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/credentials/list	55.93% (-5.18%)	👎

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/bucket/create/create.go	41.67% (ø)	48	20	28
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/bucket/list/list.go	38.89% (-3.97%)	54 (+5)	21	33 (+5)	👎
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/compliance-lock/describe/describe.go	53.85% (ø)	39	21	18
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/compliance-lock/lock/lock.go	35.71% (ø)	42	15	27
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/compliance-lock/unlock/unlock.go	27.03% (ø)	37	10	27
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/credentials-group/create/create.go	50.00% (-6.76%)	42 (+5)	21	21 (+5)	👎
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/credentials-group/list/list.go	56.25% (-6.54%)	48 (+5)	27	21 (+5)	👎
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/credentials/create/create.go	53.57% (-5.25%)	56 (+5)	30	26 (+5)	👎
github.com/stackitcloud/stackit-cli/internal/cmd/object-storage/credentials/list/list.go	55.93% (-5.18%)	59 (+5)	33	26 (+5)	👎

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.