v3.7-branch: modules: percepio: Fix python executable name in CMakeLists.txt

[eriktamlin]

Describe the bug
When using syscall extensions (to optimize tracing of syscalls) CMakeLists.txt for the percepio module calls on python3 using static name instead of using environment variable ${PYTHON_EXECUTABLE}.

To Reproduce
Run on Windows and enable syscall extensions.

Expected behavior
Enabling syscall extensions. No errors.

Impact
Syscall extensions cannot be used on Windows.

Logs and console output

Environment (please complete the following information):

• OS: Windows

Additional context
This issue is going to be used to backport #77544 to 3.7 once that is approved.