Summary:
Consolidates the test flags needed to turn the ysql lease feature on.

If `TEST_enable_object_locking_for_table_locks` is true, then the lease feature gated by `TEST_enable_ysql_operation_lease` is also enabled, regardless of the value of `TEST_enable_ysql_operation_lease`.
Default `TEST_tserver_enable_ysql_lease_refresh` to true.
Jira: DB-15778

Test Plan:
```
% ./yb_build.sh fastdebug --with-tests --cxx-test object_lock-test
% ./yb_build.sh fastdebug --with-tests --cxx-test master-test --gtest_filter '*RefreshYsqlLease*'
```

Reviewers: amitanand, bkolagani, rthallam

Reviewed By: amitanand, rthallam

Subscribers: rthallam, slingam, ybase, yql

Differential Revision: https://phorge.dev.yugabyte.com/D42724