mesa-vpu: use mesa from debian bookworm-backports

[amazingfate]

Description

Now debian has backported mesa 24.2.2 for bookworm: https://packages.debian.org/source/bookworm-backports/mesa, and there is no need to use a thirdparty obs repo.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• ./compile.sh BOARD=armsom-w3 BRANCH=vendor BUILD_MINIMAL=no DEB_COMPRESS=xz KERNEL_CONFIGURE=no RELEASE=bookworm KERNEL_GIT=shallow BUILD_DESKTOP=yes DESKTOP_APPGROUPS_SELECTED= DESKTOP_ENVIRONMENT=gnome DESKTOP_ENVIRONMENT_CONFIG_NAME=config_base ENABLE_EXTENSIONS="mesa-vpu"

Checklist:

Please delete options that are not relevant.

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules