ci: bump rust version from 1.90 to 1.96

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41620>

.gitlab-ci/container/build-rust.sh

@@ -9,15 +9,17 @@ section_start rust "Building Rust toolchain"
 
 # When changing this file, you need to bump the following
 # .gitlab-ci/image-tags.yml tags:
+# ALPINE_X86_64_BUILD_TAG
 # DEBIAN_BUILD_BASE_TAG
 # DEBIAN_TEST_BASE_TAG
+# FEDORA_X86_64_BUILD_TAG
 
 MINIMUM_SUPPORTED_RUST_VERSION=$(python3 -c 'import tomllib; print(tomllib.load(open("clippy.toml", "rb"))["msrv"])')
 
 # This version number can be bumped freely, to benefit from the latest
 # diagnostics in CI `build-only` jobs, and for building external CI
 # components.
-LATEST_RUST_VERSION=1.90.0
+LATEST_RUST_VERSION=1.96.0
 
 # For rust in Mesa, we use rustup to install.  This lets us pick an arbitrary
 # version of the compiler, rather than whatever the container's Debian comes

.gitlab-ci/image-tags.yml

@@ -19,18 +19,18 @@ include:
   - .gitlab-ci/conditional-build-image-tags.yml
 
 variables:
-  DEBIAN_BUILD_BASE_TAG: "20260529-rust-1.85"
+  DEBIAN_BUILD_BASE_TAG: "20260604-rust196"
   DEBIAN_BUILD_TAG: "20260504-screenshot"
 
-  DEBIAN_TEST_BASE_TAG: "20260529-rust-1.85"
+  DEBIAN_TEST_BASE_TAG: "20260604-rust196"
   DEBIAN_TEST_ANDROID_TAG: "20260602-angle-19"
   DEBIAN_TEST_GL_TAG: "20260609-vvl-2a"
   DEBIAN_TEST_VIDEO_TAG: "20260512-vkuprev"
   DEBIAN_TEST_VK_TAG: "20260604-vkd3d"
 
-  ALPINE_X86_64_BUILD_TAG: "20260429-libdrm"
+  ALPINE_X86_64_BUILD_TAG: "20260604-rust196"
 
-  FEDORA_X86_64_BUILD_TAG: "20260429-staticcpp"
+  FEDORA_X86_64_BUILD_TAG: "20260604-rust196"
 
   KERNEL_TAG: "v6.19-mesa-712d"
   KERNEL_REPO: "gfx-ci/linux"