Require swap syncd before running disable VOQ watchdog (sonic-net#21102)

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How did you do it?
How did you verify/test it?
 Validated on master branch qos/test_tunnel_qos_remap.py on hash 20aae03 without extra parameters (for example, without "--qos_swap_syncd=False" or disabling loganalyzer)
 Validated on 202411 active watermark test case passes
=============================================== 10 passed, 7 skipped, 851 warnings in 8220.27s (2:17:00) =============
sonic-mgmt$ git log -n 1                                                                                
commit 20aae03 (HEAD -> voq_wd_syncd_swap_issue_master, origin/voq_wd_syncd_swap_issue_master)          
Author: Randall Pittman <[email protected]>                                                                                             
Date:   Wed Nov 5 23:25:14 2025 +0000                                                                                                    
                                                                                                                                         
    Require swap_syncd before setup_module.

Author: rbpittman

tests/qos/test_tunnel_qos_remap.py

@@ -70,7 +70,7 @@ def check_running_condition(tbinfo, duthost):
 
 
 @pytest.fixture(scope='module', autouse=True)
-def disable_pfcwd(duthosts):
+def disable_pfcwd(duthosts, swap_syncd):  # noqa: F811
     pfcwd_value = {}
     for duthost in duthosts:
         pfcwd_value[duthost.hostname] = get_pfcwd_config(duthost)

tests/qos/tunnel_qos_remap_base.py

@@ -441,7 +441,7 @@ def _update_counterpoll_state(duthost, counter_name, state):
 
 
 @pytest.fixture(scope='module')
-def setup_module(rand_selected_dut, rand_unselected_dut, update_docker_services):
+def setup_module(rand_selected_dut, rand_unselected_dut, update_docker_services, swap_syncd):
     '''
     Module level setup/teardown
     '''
@@ -556,7 +556,13 @@ def run_ptf_test(ptfhost, test_case='', test_params={}):
 
 
 @pytest.fixture(scope='module', autouse=True)
-def disable_voq_watchdog_dualtor(duthosts, rand_selected_dut):
+def disable_voq_watchdog_dualtor(duthosts, rand_selected_dut, swap_syncd):
+    """
+    Disable VOQ watchdog for dualtor tests.
+
+    Note: This fixture depends on swap_syncd to ensure VOQ watchdog is disabled
+    AFTER the config reload that happens during syncd swap.
+    """
     get_src_dst_asic_and_duts = {}
     get_src_dst_asic_and_duts["single_asic_test"] = True
     get_src_dst_asic_and_duts["dst_dut"] = rand_selected_dut