test: suppress libzmq-induced thread-sanitizer false positives

- libzmq is not tsan-instrumented, so tsan cannot see the happens-before
  its queues establish between user threads and libzmq I/O threads,
  producing false-positive data races on message buffers
- add test/thread_sanitizer_suppressions.txt and point TSAN_OPTIONS at it
  via the sanitizers job env so it reaches the tests and their device
  subprocesses
- suppress: accesses made directly from libzmq, the zero-copy message
  deleters libzmq runs from msg_t::close, shmem receive-side metadata
  reads, and std::regex/locale lazy-init races in libstdc++

.github/workflows/ci.yml

@@ -68,6 +68,8 @@ jobs:
     if: github.repository == 'FairRootGroup/FairMQ'
     name: ${{ matrix.sanitizer.name }}
     runs-on: ubuntu-24.04
+    env:
+      TSAN_OPTIONS: suppressions=${{ github.workspace }}/test/thread_sanitizer_suppressions.txt
     strategy:
       fail-fast: false
       matrix: