gh-130605: Temporarily disable test_concurrent_futures in TSAN CI job (gh-130606)

There are a number of data races in the default build without
suppressions that are exposed by this test. Disable the test for now
under TSAN until we have suppressions or fix the data races.

Author: colesbury

Lib/test/libregrtest/tsan.py

@@ -6,7 +6,7 @@
     'test_capi.test_mem',
     'test_capi.test_pyatomic',
     'test_code',
-    'test_concurrent_futures',
+    # 'test_concurrent_futures',  # gh-130605: too many data races
     'test_enum',
     'test_functools',
     'test_httpservers',