config: jobs: Enable TuxMake backend for primary architectures

The traditional make-based builds required manual configuration of build
parameters and artifact collection. TuxMake provides a cleaner interface
with native fragment support, so let's use it.

Enable backend: tuxmake for the 8 primary kbuild params anchors covering
arm64, x86, arm, and riscv with both clang-21 and gcc-14 compilers.

Signed-off-by: Anders Roxell <anders.roxell@linaro.org>

Author: roxell

config/jobs.yaml

@@ -39,6 +39,7 @@ _anchors:
     <<: *kbuild-job
     image: ghcr.io/kernelci/{image_prefix}clang-21:arm64-kselftest-kernelci
     params: &kbuild-clang-21-arm64-params
+      backend: tuxmake
       arch: arm64
       compiler: clang-21
       cross_compile: 'aarch64-linux-gnu-'
@@ -48,6 +49,7 @@ _anchors:
     <<: *kbuild-job
     image: ghcr.io/kernelci/{image_prefix}clang-21:x86-kselftest-kernelci
     params: &kbuild-clang-21-x86-params
+      backend: tuxmake
       arch: x86_64
       compiler: clang-21
       defconfig: x86_64_defconfig
@@ -56,6 +58,7 @@ _anchors:
     <<: *kbuild-job
     image: ghcr.io/kernelci/{image_prefix}gcc-14:arm64-kselftest-kernelci
     params: &kbuild-gcc-14-arm64-params
+      backend: tuxmake
       arch: arm64
       compiler: gcc-14
       cross_compile: 'aarch64-linux-gnu-'
@@ -81,6 +84,7 @@ _anchors:
     <<: *kbuild-job
     image: ghcr.io/kernelci/{image_prefix}gcc-14:x86-kselftest-kernelci
     params: &kbuild-gcc-14-x86-params
+      backend: tuxmake
       arch: x86_64
       compiler: gcc-14
       defconfig: x86_64_defconfig
@@ -222,6 +226,7 @@ jobs:
     <<: *kbuild-job
     image: ghcr.io/kernelci/{image_prefix}clang-21:arm-kselftest-kernelci
     params: &kbuild-clang-21-arm-params
+      backend: tuxmake
       arch: arm
       compiler: clang-21
       cross_compile: 'arm-linux-gnueabihf-'
@@ -461,6 +466,7 @@ jobs:
     <<: *kbuild-job
     image: ghcr.io/kernelci/{image_prefix}clang-21:riscv64-kselftest-kernelci
     params: &kbuild-clang-21-riscv-params
+      backend: tuxmake
       arch: riscv
       compiler: clang-21
       cross_compile: 'riscv64-linux-gnu-'
@@ -635,6 +641,7 @@ jobs:
     <<: *kbuild-job
     image: ghcr.io/kernelci/{image_prefix}gcc-14:arm-kselftest-kernelci
     params: &kbuild-gcc-14-arm-params
+      backend: tuxmake
       arch: arm
       compiler: gcc-14
       cross_compile: 'arm-linux-gnueabihf-'
@@ -1296,6 +1303,7 @@ jobs:
     <<: *kbuild-job
     image: ghcr.io/kernelci/{image_prefix}gcc-14:riscv64-kselftest-kernelci
     params: &kbuild-gcc-14-riscv-params
+      backend: tuxmake
       arch: riscv
       compiler: gcc-14
       cross_compile: 'riscv64-linux-gnu-'