Update CEL C++ Abseil dependency and toolchains.

- Update abseil-cpp to 20260526.0 in MODULE.bazel.
- Update Dockerfile and cloudbuild.yaml to use clang-12 and gcc-10.
- Note: The Docker image needs to be rebuilt and the SHA in cloudbuild.yaml updated.

PiperOrigin-RevId: 930551361

Author: seirl

Dockerfile

@@ -41,8 +41,8 @@ RUN apt-get update && apt-get upgrade -y && \
       zip \
       zlib1g-dev \
       default-jdk-headless \
-      clang-11 \
-      gcc-9 g++-9 \
+      clang-12 \
+      gcc-10 g++-10 \
       tzdata \
       && apt-get clean
 
@@ -63,7 +63,7 @@ RUN mkdir -p /bazel
 RUN USE_BAZEL_VERSION=8.7.0 bazelisk help
 RUN USE_BAZEL_VERSION=7.3.2 bazelisk help
 
-ENV CC=gcc-9
-ENV CXX=g++-9
+ENV CC=gcc-10
+ENV CXX=g++-10
 
 ENTRYPOINT ["/usr/bin/bazelisk"]

MODULE.bazel

@@ -38,7 +38,7 @@ bazel_dep(
 )
 bazel_dep(
     name = "abseil-cpp",
-    version = "20260107.0",
+    version = "20260526.0",
     repo_name = "com_google_absl",
 )
 bazel_dep(

cloudbuild.yaml

@@ -14,12 +14,12 @@ steps:
   - '--local_ram_resources=HOST_RAM*.4'
   - '--remote_cache=https://storage.googleapis.com/cel-cpp-remote-cache'
   - '--google_default_credentials'
-  id: gcc-9
+  id: gcc-10
   waitFor: ['-']
 - name: 'gcr.io/cel-analysis/cel-cpp/ubuntu_floor@sha256:211a0c505b361d987b3d8b08a5144a84e62cb95edc3f897fe46d5cd3f556f79d'
   env:
-  - 'CC=clang-11'
-  - 'CXX=clang++-11'
+  - 'CC=clang-12'
+  - 'CXX=clang++-12'
   args:
   - '--output_base=/bazel' # This is mandatory to avoid steps accidently sharing data.
   - 'test'
@@ -34,7 +34,7 @@ steps:
   - '--local_ram_resources=HOST_RAM*.4'
   - '--remote_cache=https://storage.googleapis.com/cel-cpp-remote-cache'
   - '--google_default_credentials'
-  id: clang-11
+  id: clang-12
   waitFor: ['-']
 timeout: 1h
 options: