Allow AUTH_TYPE_UNSPECIFIED in auth config for connection (#12629) (#20782)

[upstream:5fdcb6ef8f1b6fa149a8062dd386e23236bd26bd]

Signed-off-by: Modular Magician <magic-modules@google.com>

Author: modular-magician

.changelog/12629.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+integrationconnectors: allowed `AUTH_TYPE_UNSPECIFIED` option in `google_integration_connectors_connection` resource to support non-standard auth types
+```

google/services/integrationconnectors/resource_integration_connectors_connection.go

@@ -103,8 +103,8 @@ func ResourceIntegrationConnectorsConnection() *schema.Resource {
 						"auth_type": {
 							Type:         schema.TypeString,
 							Required:     true,
-							ValidateFunc: verify.ValidateEnum([]string{"USER_PASSWORD", "OAUTH2_JWT_BEARER", "OAUTH2_CLIENT_CREDENTIALS", "SSH_PUBLIC_KEY", "OAUTH2_AUTH_CODE_FLOW"}),
-							Description:  `authType of the Connection Possible values: ["USER_PASSWORD", "OAUTH2_JWT_BEARER", "OAUTH2_CLIENT_CREDENTIALS", "SSH_PUBLIC_KEY", "OAUTH2_AUTH_CODE_FLOW"]`,
+							ValidateFunc: verify.ValidateEnum([]string{"AUTH_TYPE_UNSPECIFIED", "USER_PASSWORD", "OAUTH2_JWT_BEARER", "OAUTH2_CLIENT_CREDENTIALS", "SSH_PUBLIC_KEY", "OAUTH2_AUTH_CODE_FLOW"}),
+							Description:  `authType of the Connection Possible values: ["AUTH_TYPE_UNSPECIFIED", "USER_PASSWORD", "OAUTH2_JWT_BEARER", "OAUTH2_CLIENT_CREDENTIALS", "SSH_PUBLIC_KEY", "OAUTH2_AUTH_CODE_FLOW"]`,
 						},
 						"additional_variable": {
 							Type:        schema.TypeList,

website/docs/r/integration_connectors_connection.html.markdown

@@ -430,7 +430,7 @@ The following arguments are supported:
 * `auth_type` -
   (Required)
   authType of the Connection
-  Possible values are: `USER_PASSWORD`, `OAUTH2_JWT_BEARER`, `OAUTH2_CLIENT_CREDENTIALS`, `SSH_PUBLIC_KEY`, `OAUTH2_AUTH_CODE_FLOW`.
+  Possible values are: `AUTH_TYPE_UNSPECIFIED`, `USER_PASSWORD`, `OAUTH2_JWT_BEARER`, `OAUTH2_CLIENT_CREDENTIALS`, `SSH_PUBLIC_KEY`, `OAUTH2_AUTH_CODE_FLOW`.
 
 * `additional_variable` -
   (Optional)