Move PhySim definition to openair1/SIMULATION/tests

Most (but not all) physical simulators are defined under
openair1/SIMULATION/. Defining physical simulators below there seems to
be the more "obvious" directory anyway, as the physical simulators are

    openair1/SIMULATION/tests
    Phy(L1)  Sim        tests => PhySim (tests)

doc/physical-simulators.md

@@ -100,7 +100,7 @@ ctest -L nr_ulsch -j 4
 To define a new test or modify existing ones, update the following file:
 
 ```
-openair1/PHY/CODING/tests/CMakeLists.txt
+openair1/SIMULATION/tests/CMakeLists.txt
 ```
 
 Use the `add_physim_test` macro with the following arguments:

docker/Dockerfile.phySim.rhel9

@@ -98,7 +98,7 @@ RUN ldconfig && \
 WORKDIR /opt/oai-physim/
 
 COPY --from=phy-sim-build \
-    /oai-ran/cmake_targets/ran_build/build/openair1/PHY/CODING/tests/CTestTestfile.cmake \
+    /oai-ran/cmake_targets/ran_build/build/openair1/SIMULATION/tests/CTestTestfile.cmake \
     /opt/oai-physim/
 
 #CMD ["sleep", "infinity"]

openair1/CMakeLists.txt

@@ -1 +1,2 @@
 add_subdirectory(PHY)
+add_subdirectory(SIMULATION)

openair1/PHY/CODING/CMakeLists.txt

@@ -68,7 +68,3 @@ if (ENABLE_LDPC_CUDA)
 endif()
 
 add_subdirectory(nrLDPC_coding)
-
-if(ENABLE_PHYSIM_TESTS)
-  add_subdirectory(tests)
-endif()

openair1/SIMULATION/CMakeLists.txt

@@ -0,0 +1,3 @@
+if(ENABLE_PHYSIM_TESTS)
+  add_subdirectory(tests)
+endif()