Incorrect PVID set for tagged VLAN members

[keboliu]

Description

If add an interface as a tagged member to a VLAN, the PVID of this interface will be set to 1, however VLAN 1 is the default VLAN and not exist in ASIC DB. Untagged packets arrived at this tagged member interface will trigger mac learning in VLAN1, and will cause "show mac" failure and other issues. like described in another issue sonic-net/sonic-utilities#894.

suggest setting PVID to some other value instead of using 1 when adding a tagged member to VLAN.

Steps to reproduce the issue:

1. create a VLAN
2. add an interface to the VLAN as a tagged member
3. check the PVID of the newly added VLAN member.

Describe the results you received:

Describe the results you expected:

Additional information you deem important (e.g. issue happens only occasionally):

**Output of `show version`:**

```
(paste your output here)
```

**Attach debug file `sudo generate_dump`:**

```
(paste your output here)
```

[anshuv-mfst]

Please provide show tech support output.

[keboliu]

sonic_dump_arc-mtbc-1001_20210302_062502.tar.gz

@anshuv-mfst I attached the show tech as an attachement.
image info: master branch, community commit hash: e179ec2

config command:
config vlan member add 1000 Ethernet0

[anshuv-mfst]

@gechiang - could you please look into the issue, thank you.

[dprital]

Hi, Any update here ?

[prsunny]

The original issue reported w.r.t mac learning on vlan 1 is fixed by sonic-net/sonic-utilities#1368.

[qiluo-msft]

@prsunny sonic-net/sonic-utilities#1368 is a workaround after this issue happens. Need a root fix still.