west: runners: stm32cubeprogrammer: Fixed behaivor if programmer is in path

Enabled west commands to use CubeProgrammer installed in custom directory.

Signed-off-by: Moritz Geier <moritz.geier@proton.me>

scripts/west_commands/runners/stm32cubeprogrammer.py

@@ -85,6 +85,10 @@ class STM32CubeProgrammerBinaryRunner(ZephyrBinaryRunner):
             )
 
         if platform.system() == "Windows":
+            cmd = shutil.which("STM32_Programmer_CLI")
+            if cmd is not None:
+                return Path(cmd)
+
             cli = (
                 Path("STMicroelectronics")
                 / "STM32Cube"