[AS9736-64d] Fixed the pytest failed itmes.

[ec-michael-shih]

Why I did it

Fixed the pytest item failed, and found sai config need to modify(because using ec-sai)

How I did it

Fixed pytest: modify platform.json.
sai-config: fixed platform.json about sfp interface and port config.
and modify th4-as9736-64x400G.config.yml for bcm config setting.

How to verify it

Using correct sai-config, that show or sfpshow command can get information.

ex:
root@as9736-64d-1:~# sfpshow presence
Port         Presence
-----------  -----------
Ethernet0    Present
Ethernet8    Present
Ethernet16   Present
Ethernet24   Present
Ethernet32   Present
Ethernet40   Present
Ethernet48   Present
Ethernet56   Present
Ethernet64   Present
Ethernet72   Present
Ethernet80   Present
Ethernet88   Present
Ethernet96   Present
Ethernet104  Present
Ethernet112  Present
Ethernet120  Present
Ethernet128  Present
Ethernet136  Present
Ethernet144  Present
Ethernet152  Present
Ethernet160  Present
Ethernet168  Present
Ethernet176  Present
Ethernet184  Present
Ethernet192  Present
Ethernet200  Present
Ethernet208  Present
Ethernet216  Present
Ethernet224  Present
Ethernet232  Present
Ethernet240  Present
Ethernet248  Present
Ethernet256  Not present
Ethernet264  Not present
Ethernet272  Not present
Ethernet280  Not present
Ethernet288  Not present
Ethernet296  Not present
Ethernet304  Not present
Ethernet312  Not present
Ethernet320  Not present
Ethernet328  Not present
Ethernet336  Not present
Ethernet344  Not present
Ethernet352  Not present
Ethernet360  Not present
Ethernet368  Not present
Ethernet376  Not present
Ethernet384  Not present
Ethernet392  Not present
Ethernet400  Not present
Ethernet408  Not present
Ethernet416  Not present
Ethernet424  Not present
Ethernet432  Not present
Ethernet440  Not present
Ethernet448  Not present
Ethernet456  Not present
Ethernet464  Not present
Ethernet472  Not present
Ethernet480  Not present
Ethernet488  Not present
Ethernet496  Not present
Ethernet504  Not present
Ethernet512  Not present
Ethernet513  Not present

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205

Description for the changelog

Ensure to add label/tag for the feature raised. example - PR#2174 under sonic-utilities repo. where, Generic Config and Update feature has been labelled as GCU.

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)