scripts: move zaru.py to a separate directory

This commit moves the `zaru.py` script to `scripts/instrumentation`, and
adjusts references to the script in other places.

Signed-off-by: Filip Kokosinski <[email protected]>

Author: fkokosinski

samples/subsys/instrumentation/README.rst

@@ -40,7 +40,7 @@ Alternatively you can run this using QEMU:
 
 After the sample is flashed to the target (or QEMU is running), it must be possible to
 collect and visualize traces and profiling info using the instrumentation CLI
-tool, :zephyr_file:`scripts/zaru.py`.
+tool, :zephyr_file:`scripts/instrumentation/zaru.py`.
 
 .. note::
    Please note, that this subsystem uses the ``retained_mem`` driver, hence it's necessary