[Arista] Update LT2,FT2 testcase skip for reboot, iface_namingmode

[dakotac-arista]

The fast reboot testcase fails consistently and is skipped for t1,t2. Adding lt2,ft2 topos to skip condition.

Also, removing log ignore for lt2,ft2 in iface_namingmode because the testcase is not supported due to ASIC limitations. The test will pass because the speed is changed but the interface will stay down causing issues in following iface_naming mode tests.

The skip is present in master but is missing a backport to msft-202503: #19074

Description of PR

Summary:
Fixes # (issue)

Type of change

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

Back port request

• 202205
• 202305
• 202311
• 202405
• 202411
• 202505
• 202511
• msft-202503

Approach

What is the motivation for this PR?

2026 Jan  6 00:56:30.286401 qspf305 NOTICE swss#orchagent: :- handleNotification: Get port state change notification id:1000000000003 status:2 oper_error_status:0x0                                                                 
2026 Jan  6 00:56:30.286416 qspf305 NOTICE swss#orchagent: :- updatePortOperStatus: Port Ethernet0 oper state set from up to down                        
2026 Jan  6 00:56:30.286815 qspf305 WARNING pmon#DomInfoUpdateTask[34]: *** ('Ethernet0', 'APPL_DB', 'PORT_TABLE') handle_port_update_event() fvp {'index': '1', 'flap_count': '4', 'port_name': 'Ethernet0', 'asic_id': 0, 'op': 'SET'}                                                                          
2026 Jan  6 00:56:30.288624 qspf305 NOTICE swss#orchagent: :- setHostIntfsOperStatus: Set operation status DOWN to host interface Ethernet0

How did you do it?

How did you verify/test it?

Skipping the test_config_interface_speed test resolved all other test failures.

Any platform specific information?

Supported testbed topology if it's a new test case?

Documentation

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[dakotac-arista]

I've raised a PR to cherry pick the missing change to msft-202503: Azure/sonic-mgmt.msft#951

[dakotac-arista]

/azp run

[azure-pipelines]

Commenter does not have sufficient privileges for PR 21858 in repo sonic-net/sonic-mgmt

[dakotac-arista]

Will handle these things separately.