[Thinkit] Remove mask for l3_admit_test.Simplify P4RuntimeSession stream reading interfaces.Remove threading from hashing tests.use StrContains on bad payloads like we do with the good payloads.Fix Typo forwaring to forwarding.Add VLAN behavior verification test. (#1018)

Co-authored-by: kishanps <kishanps@google.com>

Author: VSuryaprasad-HCL

tests/forwarding/BUILD.bazel

@@ -384,7 +384,6 @@ cc_library(
         "//p4_pdpi/packetlib:packetlib_cc_proto",
         "//tests/lib:p4info_helper",
 	"//tests/lib:p4rt_fixed_table_programming_helper",
-        "//tests/lib:packet_in_helper",
         "//tests/lib:switch_test_setup_helpers",
         "//thinkit:mirror_testbed",
         "//thinkit:mirror_testbed_fixture",

tests/forwarding/fuzzer_tests.h

@@ -36,7 +36,6 @@ namespace p4_fuzzer {
 enum class Milestone {
   // Tests that the switch adheres to the minimum guarantees on resources
   // currently defined in
-  // google3/third_party/pins_infra/sai_p4/instantiations/google/minimum_guaranteed_sizes.p4.
   kResourceLimits,
   kInvalidInputs,
 };