[thready-tsan] Fix filtering of thready_tsan tests (#36820)

Closes #36820

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36820 from ctiller:thready-fuzzer-huh b12404d76b
PiperOrigin-RevId: 640655195

tools/remote_build/linux.bazelrc

@@ -75,7 +75,7 @@ build:thready_tsan --copt=-gmlt
 # use double the default value for "moderate" and "long" timeout as sanitizer
 # tests tend to be slower
 build:thready_tsan --test_timeout=60,600,1800,3600
-build:thready_tsan --test_tag_filters=-no_linux,-notsan,-qps_json_driver
+build:thready_tsan --test_tag_filters=thready_tsan,-no_linux,-notsan,-qps_json_driver
 
 # undefined behavior sanitizer: most settings are already in %workspace%/.bazelrc
 # we only need a few additional ones that are Foundry specific