…ion for everflow IPv6 erspan_ipv6-default test (sonic-net#806)

<!--
Please make sure you've read and understood our contributing guidelines;
https://github.com/sonic-net/SONiC/blob/gh-pages/CONTRIBUTING.md

Please provide following information to help code review process a bit easier:
-->
### Description of PR
<!--
- Please include a summary of the change and which issue is fixed.
- Please also include relevant motivation and context. Where should reviewer start? background context?
- List any dependencies that are required for this change.
-->

Summary: Add Mellanox ASIC skip condition to the exact match rule for test_everflow_per_interface[ipv6-erspan_ipv6-default] because exact match rules have higher priority than prefix match rules, causing the test to ignore the Mellanox skip condition in the prefix match configuration.

Fixes # (issue)

### Type of change

<!--
- Fill x for your type of change.
- e.g.
- [x] Bug fix
-->

- [ ] Bug fix
- [ ] Testbed and Framework(new/improvement)
- [ ] New Test case
 - [x] Skipped for non-supported platforms
- [ ] Test case improvement

### Back port request
- [ ] 202205
- [ ] 202305
- [ ] 202311
- [ ] 202405
- [x] 202411
- [ ] 202505

### Approach
#### What is the motivation for this PR?
Skip everflow per interface IPv6 test on Mellanox ASICs
#### How did you do it?
Add Mellanox ASIC skip condition to the exact match rule for test_everflow_per_interface[ipv6-erspan_ipv6-default] because exact match rules have higher priority than prefix match rules, causing the test to ignore the Mellanox skip condition in the prefix match configuration.

#### How did you verify/test it?
```
================================================== short test summary info ===================================================
SKIPPED [1] everflow/test_everflow_per_interface.py: SAI_STATUS_NOT_SUPPORTED for everflow over IPv6 on Arista-7260CX3 and Arista-7060CX. Skip everflow per interface IPv6 test on unsupported platforms
=============================================== 1 skipped, 1 warning in 54.18s ===============================================
```
#### Any platform specific information?
str5-sn5640-2
#### Supported testbed topology if it's a new test case?
t0-isolated-d32u32s2
### Documentation
<!--
(If it's a new feature, new test case)
Did you update documentation/Wiki relevant to your implementation?
Link to the wiki page?
-->

1906fdf [pyext] Update Makefile to disable warning Wconversion for older swig (sonic-net#817)
1dbcaeb Remove gbsyncd_startup.py (sonic-net#813)
0372615 [vslib] Refresh queue pause status (sonic-net#814)
00d883c [sairedis] Add sai_dbg_generate_dump api to redis interface (sonic-net#811)
8585803 [sairedis] Unlock api mutex for communication mode (sonic-net#812)
c69549a [pyext] Add SWIG sairedis python submodule (sonic-net#806)

)

Submodule src/sonic-swss 4b489ce..90eb25d:
  > [portsorch] fix bug in speed set (sonic-net#806)

Submodule src/sonic-swss-common 2592b0c..c674e64:
  > Add multiple fields hdel support (sonic-net#267)
  > Update PFC_WD table name in CONFIG_DB (sonic-net#266)

Signed-off-by: Ying Xie <ying.xie@microsoft.com>