[DPU] [HA] Add support for Flow API

[vivekrnv]

What I did

HLD: https://github.com/sonic-net/SONiC/pull/2168

Depends on ??

Why I did it

How I verified it

UT's and applied session config and verified the FINISHED, TImeout and StateDb update events

vkarri@4afe9d3ee71a:/sonic/src/sonic-swss/tests/mock_tests$ ./tests --gtest_filter="*DashHaFlowOrchTest*"
Running main() from ./googletest/src/gtest_main.cc
Note: Google Test filter = *DashHaFlowOrchTest*
[==========] Running 15 tests from 1 test suite.
[----------] Global test environment set-up.
[----------] 15 tests from DashHaFlowOrchTest
[ RUN      ] DashHaFlowOrchTest.CreateRemoveFlowSyncSession
[       OK ] DashHaFlowOrchTest.CreateRemoveFlowSyncSession (19 ms)
[ RUN      ] DashHaFlowOrchTest.CreateFlowSyncSessionMissingFields
[       OK ] DashHaFlowOrchTest.CreateFlowSyncSessionMissingFields (16 ms)
[ RUN      ] DashHaFlowOrchTest.CreateFlowDumpSessionWithFilters
[       OK ] DashHaFlowOrchTest.CreateFlowDumpSessionWithFilters (16 ms)
[ RUN      ] DashHaFlowOrchTest.CreateFlowDumpSessionWaitingForFilters
[       OK ] DashHaFlowOrchTest.CreateFlowDumpSessionWaitingForFilters (16 ms)
[ RUN      ] DashHaFlowOrchTest.DuplicateSessionCreation
[       OK ] DashHaFlowOrchTest.DuplicateSessionCreation (16 ms)
[ RUN      ] DashHaFlowOrchTest.CreateFlowSyncSessionSAIFailure
[       OK ] DashHaFlowOrchTest.CreateFlowSyncSessionSAIFailure (16 ms)
[ RUN      ] DashHaFlowOrchTest.CreateFlowDumpSessionSAIFailure
[       OK ] DashHaFlowOrchTest.CreateFlowDumpSessionSAIFailure (16 ms)
[ RUN      ] DashHaFlowOrchTest.CreateFlowDumpFilterInvalidKey
[       OK ] DashHaFlowOrchTest.CreateFlowDumpFilterInvalidKey (16 ms)
[ RUN      ] DashHaFlowOrchTest.CreateFlowDumpFilterInvalidOp
[       OK ] DashHaFlowOrchTest.CreateFlowDumpFilterInvalidOp (38 ms)
[ RUN      ] DashHaFlowOrchTest.RemoveFlowDumpFilter
[       OK ] DashHaFlowOrchTest.RemoveFlowDumpFilter (16 ms)
[ RUN      ] DashHaFlowOrchTest.HandleFinishedBulkSyncSession
[       OK ] DashHaFlowOrchTest.HandleFinishedBulkSyncSession (16 ms)
[ RUN      ] DashHaFlowOrchTest.HandleTimeoutBulkSyncSession
[       OK ] DashHaFlowOrchTest.HandleTimeoutBulkSyncSession (16 ms)
[ RUN      ] DashHaFlowOrchTest.HandleFinishedFlowDumpSession
[       OK ] DashHaFlowOrchTest.HandleFinishedFlowDumpSession (16 ms)
[ RUN      ] DashHaFlowOrchTest.HandleTimeoutFlowDumpSession
[       OK ] DashHaFlowOrchTest.HandleTimeoutFlowDumpSession (16 ms)
[ RUN      ] DashHaFlowOrchTest.CreateBothFlowDumpAndBulkSyncSessions
[       OK ] DashHaFlowOrchTest.CreateBothFlowDumpAndBulkSyncSessions (16 ms)
[----------] 15 tests from DashHaFlowOrchTest (268 ms total)

[----------] Global test environment tear-down
[==========] 15 tests from 1 test suite ran. (268 ms total)
[  PASSED  ] 15 tests.

Details if related

[dgsudharsan]

Should reset be called here to reset other global fields as well?

[vivekrnv]

Handled, remove clearKey altogether, only using reset() to clear state