Fix more tests on VOQ systems without chassis_app_db

[arista-nwolfe]

Should skip/fix:
bgp/test_traffic_shift_lc.py
bgp/test_startup_tsa_tsb_service.py
voq/test_voq_intfs.py

Failures seen:
bgp/test_traffic_shift_lc.py:

bgp/bgp_helpers.py:989: in run_tsb_on_linecard_and_verify
    if verify_dut_configdb_tsa_value(lc) is not False or get_tsa_chassisdb_config(lc) != 'false' or \
                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        lc         = <MultiAsicSonicHost ctn101>
bgp/bgp_helpers.py:946: in get_tsa_chassisdb_config
    tsa_conf = duthost.shell('sonic-db-cli CHASSIS_APP_DB HGET \'BGP_DEVICE_GLOBAL|STATE\' tsa_enabled')['stdout']
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        duthost    = <MultiAsicSonicHost ctn101>

bgp/test_startup_tsa_tsb_service.py:

bgp/bgp_helpers.py:989: in run_tsb_on_linecard_and_verify
    if verify_dut_configdb_tsa_value(lc) is not False or get_tsa_chassisdb_config(lc) != 'false' or \
                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        lc         = <MultiAsicSonicHost ctn101>
bgp/bgp_helpers.py:946: in get_tsa_chassisdb_config
    tsa_conf = duthost.shell('sonic-db-cli CHASSIS_APP_DB HGET \'BGP_DEVICE_GLOBAL|STATE\' tsa_enabled')['stdout']
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        duthost    = <MultiAsicSonicHost ctn101>

voq/test_voq_intfs.py:

voq/test_voq_init.py:219: in check_voq_interfaces
    voqdb = VoqDbCli(per_host)
            ^^^^^^^^^^^^^^^^^^
        <trim>
common/helpers/sonic_db.py:503: in __init__
    output = host.command("grep chassis_db_address /etc/sonic/chassisdb.conf")
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        __class__  = &lt;class 'tests.common.helpers.sonic_db.VoqDbCli'&gt;
        host       = &lt;MultiAsicSonicHost ctn101&gt;
        self       = &lt;tests.common.helpers.sonic_db.VoqDbCli object at 0x7f96ea1591f0&gt;

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

[mssonicbld]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[StormLiangMS]

LGTM — clean fix guarding get_tsa_chassisdb_config() behind is_chassis check for non-chassis VOQ systems. CI all green.

[yxieca]

@arista-nwolfe going forward, please use the PR template defined in the repo. Thanks.