ci: Properly clean up rustup

Use `rustup self uninstall -y` instead of manually removing folders to
ensure a proper cleanup of the rustup installation, including cargo and
init command injections in shell rc files.

Failing to do so can cause issues, such as bash failing to run in a `set
-e` environment due to a missing `$HOME/.cargo/env`, for example.

Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33519>

.gitlab-ci/container/debian/test-base.sh

@@ -220,7 +220,8 @@ uncollapsed_section_switch debian_cleanup "Cleaning up base Debian system"
 
 apt-get purge -y "${EPHEMERAL[@]}"
 
-rm -rf /root/.rustup
+# Properly uninstall rustup including cargo and init scripts on shells
+rustup self uninstall -y
 
 . .gitlab-ci/container/container_post_build.sh
 

.gitlab-ci/container/debian/x86_64_test-android.sh

@@ -59,8 +59,8 @@ export RUST_TARGET=x86_64-linux-android
 . .gitlab-ci/container/build-rust.sh
 . .gitlab-ci/container/build-deqp-runner.sh
 
-rm -rf /root/.cargo
-rm -rf /root/.rustup
+# Properly uninstall rustup including cargo and init scripts on shells
+rustup self uninstall -y
 
 ############### Build dEQP
 

.gitlab-ci/image-tags.yml

@@ -13,7 +13,7 @@
 
 variables:
    DEBIAN_X86_64_BUILD_BASE_IMAGE: "debian/x86_64_build-base"
-   DEBIAN_BASE_TAG: "20250204-arm32"
+   DEBIAN_BASE_TAG: "20250213-rustup"
 
    DEBIAN_X86_64_BUILD_IMAGE_PATH: "debian/x86_64_build"
    DEBIAN_BUILD_TAG: "20250210-android-drm"