Add WIF credential input to integration and export resources

[jaym]

Summary

Follow-up to #416 (which exposed the computed wif_subject attribute). Makes WIF (Workload Identity Federation) configurable end-to-end for the four resources where the server supports it, so customers can run without long-lived service account JSON / IAM access keys.

• mondoo_integration_gcp, mondoo_export_gcs_bucket: static credentials.private_key is now optional; new credentials.wif { audience, service_account_email } block as an alternative. ConflictsWith + AtLeastOneOf enforce exactly one auth method.
• mondoo_integration_aws: new credentials.wif { audience, role_arn } alongside the existing role and key options; all three pair-wise conflict.
• mondoo_export_bigquery: service_account_key is now optional with RequiresReplace() dropped; new credentials.wif { audience, service_account_email } block gated by ExactlyOneOf so users can flip between static creds and WIF without recreating the export.
• Read and ImportState round-trip the new WIF fields from the server response.
• Docs regenerated via go generate ./....

Examples

mondoo_integration_gcp

WIF (no static credentials):

resource "mondoo_integration_gcp" "prod" {
  name       = "gcp-prod"
  project_id = "my-gcp-project"
  credentials = {
    wif = {
      audience              = "https://iam.googleapis.com/projects/123456789/locations/global/workloadIdentityPools/mondoo-pool/providers/mondoo-provider"
      service_account_email = "mondoo-tf@my-gcp-project.iam.gserviceaccount.com"
    }
  }
}

output "gcp_wif_subject" {
  value = mondoo_integration_gcp.prod.wif_subject
}

Static service account (unchanged behavior):

resource "mondoo_integration_gcp" "prod" {
  name       = "gcp-prod"
  project_id = "my-gcp-project"
  credentials = {
    private_key = file("mondoo-sa.json")
  }
}

mondoo_integration_aws

WIF:

resource "mondoo_integration_aws" "prod" {
  name = "aws-prod"
  credentials = {
    wif = {
      audience = "mondoo"
      role_arn = "arn:aws:iam::123456789012:role/MondooAccess"
    }
  }
}

Existing role and key options are unchanged.

mondoo_export_gcs_bucket

WIF:

resource "mondoo_export_gcs_bucket" "exports" {
  name        = "gcs-exports"
  scope_mrn   = "//captain.api.mondoo.app/spaces/my-space"
  bucket_name = "my-mondoo-exports"
  credentials = {
    wif = {
      audience              = "https://iam.googleapis.com/projects/123456789/locations/global/workloadIdentityPools/mondoo-pool/providers/mondoo-provider"
      service_account_email = "mondoo-exports@my-gcp-project.iam.gserviceaccount.com"
    }
  }
}

mondoo_export_bigquery

WIF (note: credentials is a new top-level block added specifically to host wif; the static service_account_key stays at top level for backward compatibility):

resource "mondoo_export_bigquery" "exports" {
  name       = "bq-exports"
  scope_mrn  = "//captain.api.mondoo.app/spaces/my-space"
  dataset_id = "my-gcp-project.mondoo_exports"
  credentials = {
    wif = {
      audience              = "https://iam.googleapis.com/projects/123456789/locations/global/workloadIdentityPools/mondoo-pool/providers/mondoo-provider"
      service_account_email = "mondoo-bq@my-gcp-project.iam.gserviceaccount.com"
    }
  }
}

Static service account (unchanged aside from being optional and no longer triggering replace):

resource "mondoo_export_bigquery" "exports" {
  name                = "bq-exports"
  scope_mrn           = "//captain.api.mondoo.app/spaces/my-space"
  dataset_id          = "my-gcp-project.mondoo_exports"
  service_account_key = file("mondoo-bq-sa.json")
}

Test plan

• go build ./... and go vet ./... pass (verified locally).
• go generate ./... regenerates docs with only the expected diff.
• Acceptance tests pass in CI (require MONDOO_CONFIG_*, not runnable locally).
• Apply a WIF-only config for each of the four resources against a real Mondoo space; confirm wif_subject populates.
• Update a mondoo_export_bigquery resource from service_account_key to credentials.wif and confirm in-place update (no replace), validating the RequiresReplace removal.
• Verify validation errors:
  • Setting both service_account_key and credentials.wif on mondoo_export_bigquery → ExactlyOneOf error.
  • Setting credentials = {} on the other three resources → AtLeastOneOf error.
  • Setting two of role/key/wif on mondoo_integration_aws → ConflictsWith error.

Notes

• No mondoo-go bump is needed — the input / output fields are already present in the pinned version.
• The deprecated mondoo_gcs_bucket_export resource is intentionally left untouched.

🤖 Generated with Claude Code

[mondoo-code-review]

Adds workload identity federation (WIF) credential support to AWS, GCP, BigQuery, and GCS integrations as an alternative to static keys.

[mondoo-code-review]

WIF credential validation simplified and import logic hardened as requested.