[Dvaas]: Make DVaaS API take P4RT port ID mapping between SUT and control switch for non-standard mirror testbeds.

[VSuryaprasad-HCL]

Keyword Check:

~/pins_upstream/sonic-buildimage/src/sonic-p4rt/sonic-pins/p4_symbolic/sai$ ~/tools/keyword_checks.sh .
Keyword check Passed.

Build result:

INFO: Analyzed 574 targets (0 packages loaded, 0 targets configured).
INFO: Found 574 targets...
INFO: Elapsed time: 0.828s, Critical Path: 0.00s
INFO: 1 process: 1 internal.
INFO: Build completed successfully, 1 total action

Test result:

INFO: Analyzed 574 targets (0 packages loaded, 1 target configured).
INFO: Found 387 targets and 187 test targets...
INFO: Elapsed time: 181.202s, Critical Path: 118.78s
INFO: 241 processes: 284 linux-sandbox, 18 local.
INFO: Build completed successfully, 241 total actions
//dvaas:port_id_map_test                                                 PASSED in 1.1s
//gutil:collections_test                                                 PASSED in 0.9s
//gutil:io_test                                                          PASSED in 0.5s
//gutil:proto_matchers_test                                              PASSED in 0.7s
//gutil:proto_ordering_test                                              PASSED in 0.9s
//gutil:proto_test                                                       PASSED in 0.7s
//thinkit:mock_control_device_test                                       PASSED in 0.8s
//thinkit:mock_generic_testbed_test                                      PASSED in 1.2s
//thinkit:mock_mirror_testbed_test                                       PASSED in 0.7s
//thinkit:mock_ssh_client_test                                           PASSED in 0.1s
//thinkit:mock_switch_test                                               PASSED in 2.2s
//thinkit:mock_test_environment_test                                     PASSED in 1.4s
//thinkit:switch_test                                                    PASSED in 0.8s
//sai_p4/instantiations/google/tests:p4_constraints_integration_test     PASSED in 0.9s
  Stats over 5 runs: max = 0.9s, min = 0.7s, avg = 0.7s, dev = 0.1s
//sai_p4/instantiations/google/test_tools:table_entry_generator_test     PASSED in 44.0s
  Stats over 50 runs: max = 44.0s, min = 0.8s, avg = 2.8s, dev = 8.5s

Executed 187 out of 187 tests: 187 tests pass.
INFO: Build completed successfully, 241 total actions

[bibhuprasad-hcl]

@kishanps, Could you please review.
Thanks.