enable cisco8000 SAI bulk API feature

[yenlu-keith]

enable cisco8000 SAI bulk API feature

What is the motivation for this PR?
running ipfwd/test_nhop_count.py with cisco8000 will have an log analyzer's error message from monit as below if testcase configs a very huge amount NHG with more NHG members.

E Aug 10 11:05:43.720848 str2-8102-02 ERR monit[513]: 'routeCheck' status failed (255) – Failure results: {{#12 "Unaccounted_ROUTE_ENTRY_TABLE_entries": [#12 "192.168.87.132/31",#12 "192.168.87.134/31",#12 "192.168.87.136/31",#12 "192.168.87.138/31",#12 "192.168.87.150/31",#12 "192.168.87.154/31",#12 "192.168.87.156/31",#12 "192.168.87.158/31",#12 "192.168.87.160/31",#12 "192.168.87.164/31",#12 "192.168.87.166/31",#12 "192.168.87.184/31",#12

ROOT-CAUSE: ASIC_DB and AAPL_DB are not in-sync on route info on time

loganalyzer got "ERR monit" because route-check.py(sonic-utility)
compares with both DB are un-matched on routing within a certain period of time.

cisco@mth64-m5-2:~$
sonic-db-cli ASIC_DB keys * | grep -n 192.183.96.128
ASIC_STATE:SAI_OBJECT_TYPE_ROUTE_ENTRY:
{"dest":"192.183.96.128/25","switch_id":"oid:0x21000000000000","vr":"oid:0x3000000000042"}

sonic-db-cli APPL_DB keys * | grep -n 192.183.96.128
ROUTE_TABLE:192.183.96.128/25
nothing...

How did you do it?
enable SAI bulk API config from syncd to pass a set of Rid and review code-flow performance on cisco SAI/SDK layer. until route-check.py(sonic-utility) will not dump the associated ERR message.

How did you verify/test it?
PASS ipfwd/test_nhop_count.py with configing a very huge amount NHG(ex: 32K) with more NHG members(ex: each NHG with 10).

[kevinskwang]

Could you add some more description? @yenlu-keith

What is the motivation for this PR?
How did you do it?
How did you verify/test it?

[yenlu-keith]

Could you add some more description? @yenlu-keith

What is the motivation for this PR? How did you do it? How did you verify/test it?

sure. updated as above inline.

[kevinskwang]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[prsunny]

Can you check if its supported on 202012 w.r.t SAI headers?

[yenlu-keith]

Can you check if its supported on 202012 w.r.t SAI headers?

we verified based on 202012 branch with cisco 8000 SAI/SDK.

sonic will call diff SAI paths as shown below when applying "-l"
const sai_next_hop_group_api_t next_hop_group_api = {
create_next_hop_group,
remove_next_hop_group,
set_next_hop_group_attribute,
get_next_hop_group_attribute,
create_next_hop_group_member, => old
remove_next_hop_group_member, => old
set_next_hop_group_member_attribute,
get_next_hop_group_member_attribute,
create_next_hop_group_members, => new
remove_next_hop_group_members, => new

is this what u ask?