Bug: Group SPP GraphQL server error when no projectsToExclude are provided

Description:

A server error occurs when the setGroupSecretPushProtection mutation is used without providing the optional argument projectsToExclude.

When running on local GDK the error is: Internal server error: missing keyword: :projects_to_exclude

How to replicate:

Use this GraphQL query:

mutation {
  setGroupSecretPushProtection(
    input: {namespacePath: "<Group_path>", secretPushProtectionEnabled: true}
  ) {
    errors
  }
}

Replace <Group_path> with a full path to a group you have maintainer permissions to.