llext: disable verbose for SLID generation scripts

This commit removes the "-vvv" argument from the SLID generation
scripts' command line when building Zephyr or an extension with
Kconfig CONFIG_LLEXT_EXPORT_BUILTINS_BY_SLID enabled. This removes
a lot of noise in the build log (usually ~250 lines) and is fine to
do because the printed information is also saved in build artifacts.

Signed-off-by: Mathieu Choplain <mathieu.choplain@st.com>

CMakeLists.txt

@@ -1898,7 +1898,6 @@ if (CONFIG_LLEXT AND CONFIG_LLEXT_EXPORT_BUILTINS_BY_SLID)
     ${ZEPHYR_BASE}/scripts/build/llext_prepare_exptab.py
     --elf-file ${PROJECT_BINARY_DIR}/${KERNEL_ELF_NAME}
     --slid-listing ${PROJECT_BINARY_DIR}/slid_listing.txt
-    -vvv
   )
 
 endif()

cmake/modules/extensions.cmake

@@ -5444,7 +5444,6 @@ function(add_llext_target target_name)
       ${PYTHON_EXECUTABLE}
       ${ZEPHYR_BASE}/scripts/build/llext_inject_slids.py
       --elf-file ${llext_pkg_output}
-      -vvv
     )
   else()
     set(slid_inject_cmd ${CMAKE_COMMAND} -E true)