Disable T tracer in clang build

We disable for two reasons:
- in the CI, with clang, it did not build once, but I cannot reproduce
  locally (even with clang)
- we want to maintain to be able to build without T tracer, so in one
  pipeline, we have to build without it. What a lucky coincidence!

docker/Dockerfile.clang.rhel9

@@ -40,4 +40,4 @@ RUN /bin/sh oaienv && \
     mkdir -p log && \
     export CC=/usr/bin/clang && \
     export CXX=/usr/bin/clang++ && \
-    ./build_oai --phy_simulators --gNB --eNB --nrUE --UE --ninja --verbose-ci --noavx512 -c --cmake-opt -DCMAKE_C_FLAGS=-Werror --cmake-opt -DCMAKE_CXX_FLAGS=-Werror
+    ./build_oai --phy_simulators --gNB --eNB --nrUE --UE --ninja --verbose-ci --noavx512 --disable-T-Tracer -c --cmake-opt -DCMAKE_C_FLAGS=-Werror --cmake-opt -DCMAKE_CXX_FLAGS=-Werror