bugfix/listener: apply socket options on additional address

[jronak]

Commit Message: This pull request fixes an issue where socket options configured on an additional address were not applied if no socket options were specified on the primary listener address. With this change, any socket options on the additional address are now correctly applied.

Additional Description:
Reference config:

static_resources:
  listeners:
  - name: "ingress"
    address:
      socket_address:
        address: 127.0.0.1
        port_value: 1234
    additional_addresses:
    - address:
        socket_address:
          address: 127.0.0.2
          port_value: 5678
      socket_options:
        socket_options:
        - level: 1
          name: 2
          int_value: 3
          state: STATE_PREBIND
        - level: 4
          name: 5
          int_value: 6
          state: STATE_PREBIND

With this PR, the above socket options on 127.0.0.2 will be applied even though there are no socket options on 127.0.0.1.

Please let me know if this needs to go behind a runtime guard. Thanks!

Risk Level: low
Testing: unit & integration test