Increase timeouts on google_sql_database_instance to 90m

[modular-magician]

------- Stdout: -------
=== RUN   TestAccSqlDatabaseInstance_basicClone
=== PAUSE TestAccSqlDatabaseInstance_basicClone
=== CONT  TestAccSqlDatabaseInstance_basicClone
    vcr_utils.go:152: Step 1/2 error: Error running apply: exit status 1
        Error: Error waiting for Create Instance: timeout while waiting for state to become 'DONE' (last state: 'RUNNING', timeout: 40m0s)
          with google_sql_database_instance.instance,
          on terraform_plugin_test.tf line 2, in resource "google_sql_database_instance" "instance":
           2: resource "google_sql_database_instance" "instance" {
--- FAIL: TestAccSqlDatabaseInstance_basicClone (2407.16s)
FAIL

Release Note Template for Downstream PRs (will be copied)

sql: increased timeouts on `google_sql_database_instance` to 90m to account for longer-running actions such as creation through cloning

Derived from GoogleCloudPlatform/magic-modules#10960