fix(enterprise-teams): update tests — use testResourcePrefix and ConfigStateChecks

[vmvarela]

Description

Reviewer feedback:

• Use testResourcePrefix for all resource names in acceptance test configs
• Replace Check: with ConfigStateChecks: in all TestStep blocks
• Use resource.TestCase{PreCheck: ..., ProviderFactories: ...} directly (not the old testCase helper pattern)

Acceptance Criteria

• All resource/data source names in test HCL configs prefixed with testResourcePrefix
• All Check: resource.ComposeTestCheckFunc(...) replaced with ConfigStateChecks: []statecheck.StateCheck{...}
• Test structure uses resource.TestCase{...} directly
• make build passes (acceptance tests don't need to run locally)

Notes

Upstream PR: integrations#3008