Drop Bazel 7 tests

PiperOrigin-RevId: 855074337

Author: anandolee

.github/workflows/test_bazel.yml

@@ -27,7 +27,7 @@ jobs:
       fail-fast: false
       matrix:
         runner: [ ubuntu, windows, macos ]
-        bazelversion: [ '7.6.1', '8.0.0' ]
+        bazelversion: [ '8.0.0' ]
         bzlmod: [ true, false ]
         toolchain_resolution:
           # Default flags, uses from-source protoc
@@ -87,4 +87,4 @@ jobs:
           version: ${{ matrix.bazelversion }}
           bash: >
             cd examples/example_without_cc_toolchain;
-            bazel build //... $BAZEL_FLAGS --enable_bzlmod=true ${{ matrix.toolchain_resolution }};
+            bazel build //... $BAZEL_FLAGS --enable_bzlmod=true ${{ matrix.toolchain_resolution }};

.github/workflows/test_cpp.yml

@@ -40,14 +40,6 @@ jobs:
           - image: us-docker.pkg.dev/protobuf-build/containers/test/linux/sanitize:8.0.1-b77fdae6d4771789dfc66a56bf8d806354e8011a
           - targets: //pkg/... //src/... //third_party/utf8_range/... //conformance:conformance_framework_tests
           # Override cases with custom images
-          - config: { name: "Bazel7", flags: --cxxopt="-Wno-self-assign-overloaded" }
-            cache_key: Bazel7bzlmod
-            image: "us-docker.pkg.dev/protobuf-build/containers/common/linux/bazel:7.6.1-e0df73e51131ccaf53451355d22577f377357604"
-            targets: "//src/... //third_party/utf8_range/..."
-          - config: { name: "Bazel7 Workspace", flags: --noenable_bzlmod }
-            cache_key: Bazel7nobzlmod
-            image: "us-docker.pkg.dev/protobuf-build/containers/common/linux/bazel:7.6.1-e0df73e51131ccaf53451355d22577f377357604"
-            targets: "//src/... //third_party/utf8_range/..."
           - config: { name: "Bazel8", flags: --cxxopt="-Wno-self-assign-overloaded" }
             cache_key: Bazel8
             image: "us-docker.pkg.dev/protobuf-build/containers/common/linux/bazel:8.0.1-e78301df86b3e4c46ec9ac4d98be00e19305d8f3"

.github/workflows/test_java.yml

@@ -44,15 +44,6 @@ jobs:
             cache_key: '17'
             image: us-docker.pkg.dev/protobuf-build/containers/test/linux/java:8.0.1-17-168f9c9d015a0fa16611e1e9eede796fe9bfbb69
             targets: //java/... //java/internal:java_version //compatibility/...
-          - name: Bazel7
-            cache_key: 'bazel7bzlmod'
-            image: us-docker.pkg.dev/protobuf-build/containers/common/linux/bazel:7.6.1-e0df73e51131ccaf53451355d22577f377357604
-            targets: //java/... //java/internal:java_version //compatibility/...
-          - name: Bazel7 Workspace
-            cache_key: 'bazel7nobzlmod'
-            image: us-docker.pkg.dev/protobuf-build/containers/common/linux/bazel:7.6.1-e0df73e51131ccaf53451355d22577f377357604
-            targets: //java/... //java/internal:java_version //compatibility/...
-            flags: --noenable_bzlmod
           # TODO: b/395623141 - restore this test once runtime uses / emulates aarch64.
           # - name: aarch64
           #   cache_key: 'aarch64'

.github/workflows/test_python.yml

@@ -64,7 +64,7 @@ jobs:
         if: ${{ !matrix.continuous-only || inputs.continuous-run }}
         uses: protocolbuffers/protobuf-ci/bazel-docker@v5
         with:
-          image: ${{ matrix.image || format('us-docker.pkg.dev/protobuf-build/containers/test/linux/python:7.6.1-{0}-5237f14696e60e4b050edfbf7ba9b374f37f83c6', matrix.version) }}
+          image: ${{ matrix.image || format('us-docker.pkg.dev/protobuf-build/containers/test/linux/python:8.0.1-{0}-2c23b6d9f15185a1cdfebd6b1317310839a61975', matrix.version) }}
           credentials: ${{ secrets.GAR_SERVICE_ACCOUNT }}
           bazel-cache: python_linux/${{ matrix.type }}_${{ matrix.version }}
           bazel: test ${{ matrix.targets }} ${{ matrix.flags }} ${{ matrix.nobzlmod && '--noenable_bzlmod' || '' }} --test_env=KOKORO_PYTHON_VERSION
@@ -115,7 +115,7 @@ jobs:
         env:
           KOKORO_PYTHON_VERSION: ${{ matrix.version }}
         with:
-          version: 7.6.1 # Bazel version
+          version: 8.0.1 # Bazel version
           credentials: ${{ secrets.GAR_SERVICE_ACCOUNT }}
           bazel-cache: python_macos/${{ matrix.type }}_${{ matrix.version }}
           bazel: >-