fixup! feat: update the edge location resources according to new APIs

Author: claudiolor

castai/resource_edge_location.go

@@ -495,7 +495,7 @@ func (r *edgeLocationResource) Create(ctx context.Context, req resource.CreateRe
 
 	plan.ID = types.StringValue(*apiResp.JSON200.Id)
 	plan.CredentialsRevision = types.Int64Value(1)
-	// Store credential hash in private state (skip when using impersonation flow)
+	// Store credential hash in private state (skip when credentials are missing e.g. OIDC flow with AWS and GCP)
 	if mc != nil && !mc.credentials().IsNull() {
 		resp.Diagnostics.Append(r.woCredentialsStore(resp.Private).Set(ctx, mc.credentials())...)
 	}
@@ -898,7 +898,7 @@ func (r *edgeLocationResource) toGCPModel(ctx context.Context, config *omni.GCPP
 		NetworkTags:                      types.SetNull(types.StringType),
 	}
 
-	if config.InstanceServiceAccount != nil {
+	if config.InstanceServiceAccount != nil && *config.InstanceServiceAccount != "" {
 		gcp.InstanceServiceAccount = types.StringValue(*config.InstanceServiceAccount)
 	}