Revert "updated two defaults"

[modular-magician]

Reverts GoogleCloudPlatform/magic-modules#6478

It seems the change in PR GoogleCloudPlatform/magic-modules#6478 causes a bunch of tests failed due to

 provider_test.go:315: Step 1/2 error: Error running apply: exit status 1
        
        Error: Error waiting to create Connector: Error waiting for Creating Connector: Error code 3, message: Operation failed: A Connector must specify either max_throughput or max_instances.
        
          with google_vpc_access_connector.connector,
          on terraform_plugin_test.tf line 2, in resource "google_vpc_access_connector" "connector":
           2: resource "google_vpc_access_connector" "connector" {

Derived from GoogleCloudPlatform/magic-modules#6541

[github-actions]

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