findDependencies.cmake: use FindPython instead of deprecated `FindP…

…ythonInterp` (#5485)

This fixes the following warning with CMake 3.27:
```
CMake Warning (dev) at cmake/findDependencies.cmake:42 (find_package):
  Policy CMP0148 is not set: The FindPythonInterp and FindPythonLibs modules
  are removed.  Run "cmake --help-policy CMP0148" for policy details.  Use
  the cmake_policy command to set the policy and suppress this warning.

Call Stack (most recent call first):
  CMakeLists.txt:15 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.
```

cmake/findDependencies.cmake

@@ -39,13 +39,23 @@ endif()
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
-find_package(PythonInterp 3 QUIET)
-if (NOT PYTHONINTERP_FOUND)
-    set(PYTHONINTERP_FOUND "")
-    find_package(PythonInterp 2.7 QUIET)
-    if (NOT PYTHONINTERP_FOUND AND NOT USE_MATCHCOMPILER_OPT STREQUAL "Off")
+if (CMAKE_VERSION VERSION_EQUAL "3.12" OR CMAKE_VERSION VERSION_GREATER "3.12")
+    find_package(Python COMPONENTS Interpreter)
+    if (NOT Python_Interpreter_FOUND)
         message(WARNING "No python interpreter found. Therefore, the match compiler is switched off.")
         set(USE_MATCHCOMPILER_OPT "Off")
+    else()
+        set(PYTHON_EXECUTABLE ${Python_EXECUTABLE})
+    endif()
+else()
+    find_package(PythonInterp 3 QUIET)
+    if (NOT PYTHONINTERP_FOUND)
+        set(PYTHONINTERP_FOUND "")
+        find_package(PythonInterp 2.7 QUIET)
+        if (NOT PYTHONINTERP_FOUND AND NOT USE_MATCHCOMPILER_OPT STREQUAL "Off")
+            message(WARNING "No python interpreter found. Therefore, the match compiler is switched off.")
+            set(USE_MATCHCOMPILER_OPT "Off")
+        endif()
     endif()
 endif()