test: add required id field to approval flow test cases

Update all approval flow test cases to include the new required 'id' field.
Use custom flow IDs (e.g., 'test-flow', 'test-ddl-approval-flow')
instead of built-in 'bb.*' prefixed IDs for test cases.

Fixes test failures caused by adding the required id field to ApprovalTemplate.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: d-bytebase

provider/resource_setting_test.go

@@ -226,6 +226,7 @@ resource "bytebase_setting" "%s" {
 				level  = "LOW"
 			}
 			flow {
+				id          = "test-flow"
 				title       = "Test"
 				description = "Test"
 				roles = ["roles/test"]
@@ -261,6 +262,7 @@ resource "bytebase_setting" "%s" {
 				level  = "LOW"
 			}
 			flow {
+				id          = "test-flow"
 				title       = "Test"
 				description = "Test"
 				roles = ["invalid-role"]
@@ -333,6 +335,7 @@ resource "bytebase_setting" "%s" {
 				level  = "LOW"
 			}
 			flow {
+				id          = "test-ddl-approval-flow"
 				title       = "DDL Approval Flow"
 				description = "Approval flow for DDL operations"
 				roles = [
@@ -369,6 +372,7 @@ resource "bytebase_setting" "%s" {
 				level  = "MODERATE"
 			}
 			flow {
+				id          = "test-updated-approval-flow"
 				title       = "Updated Approval Flow"
 				description = "Updated approval flow"
 				roles = [bytebase_role.approval_role_%s.name]