syncd 202012 branch on SAI bulk API enabling is un-syncd to syncd master branch on processBulkOidRemove

[yenlu-keith]

[issue]

enabling SAI bulk API on syncd container will produce the SAI ERR msg as below when running with sonic-mgmt suite on ipfwd/test_nhop_count.py
ERR syncd#syncd: SAI_LOG|SAI_API_NEXT_HOP_GROUP: Bad object id 0x2d000000025e90

after reviewing the code azure 202012 branch use VID instead of RID when doing processBulkOidRemove.
no matter Bulk or normal, syncd layer will use RID to SAI layer.

https://github.com/sonic-net/sonic-sairedis/blob/master/syncd/Syncd.cpp#L1607
https://github.com/sonic-net/sonic-sairedis/blob/202012/syncd/Syncd.cpp#L1432

it should be incorrect on 202012 syncd codebase.

[reproduce steps]

enabling SAI bulk API on syncd container by
docker exec -it syncd /bin/bash
vi /usr/bin/syncd_init_common.sh
//Use bulk api`s in SAI
//currently disabled since most vendors don't support that yet
CMD_ARGS+=" -l"

run with sonic-mgmt suite on ipfwd/test_nhop_count.py

[yenlu-keith]

here is the PR commit; please kindly double commit to 202012 branch
#854