Additional parameter to clientauth_port_subset (clientauth) #290

Describe the problem

Currently the clientauth_port_subset parameter takes set of parameters as described in https://github.com/aws/pg_tle/blob/main/docs/04_hooks.md
Parameter application_name would be a added security feature where customer can prevent unauthorized access by the front-end application like pgadmin/dbeaver etc. This parameter can also be used to add any additional details for auditing purpose.

• What are you trying to solve?
  Additional security feature to prevent un-authorized access.

Describe the proposal

Adding a new parameter to the clientauth_port_subset object

• What is the feature you are proposing?
• How would it solve the problem?

Describe alternatives

• How would you solve the problem today if the feature is not built?
  PostgreSQL 17 provides functionality of login triggers, but currently this feature is not available in previous versions.
• What other alternatives are there?
  N/A