feat(firewall-manager-waf_v2): add missing attributes

[eladlevi-dy]

add missing attribues that cause drifts.

• add attributes customRequestHandling, customResponse and sampledRequestsEnabledForDefaultActions.

why

• These attributes are part of the firewall manager wafv2 policy values and had to be addressed in the module, otherwise there will be drift any time "drift detection" runs.

      ~ security_service_policy_data {
          ~ managed_service_data = jsonencode(
              ~ {
                  - customRequestHandling                   = null -> null
                  - customResponse                          = null -> null
                  - sampledRequestsEnabledForDefaultActions = null -> null
                    # (6 unchanged elements hidden)
                }
            )
            # (1 unchanged attribute hidden)
        }
        # (2 unchanged blocks hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

references

Link to AWS API_SecurityServicePolicyData

[milldr]

/terratest