build(ci): bump Bazel to 6.5.0 and update manylinux toolchain

- Bazel: Raise minimum to 6.5.0 and update repo version
- CI: Use Bazel 6.5.0 in conda-build/test GitHub Actions
- Docker: Switch manylinux image to bazel-6.5.0 tag
- Toolchain: Use devtoolset-10 for wheel builds
- Scope: Build/CI-only; no MLMD runtime or API changes

Motivation: align CI/local builds with Bazel 6.5.0 for stability and modernize the wheel build toolchain.

Author: czgdp1807

.github/workflows/conda-build.yml

@@ -47,7 +47,7 @@ jobs:
         fi
         chmod +x /tmp/bazelisk
         sudo mv /tmp/bazelisk /usr/local/bin/bazel
-        echo "USE_BAZEL_VERSION=6.1.0" >> $GITHUB_ENV
+        echo "USE_BAZEL_VERSION=6.5.0" >> $GITHUB_ENV
         bazel --version
 
     - name: Build the package

.github/workflows/conda-test.yml

@@ -47,7 +47,7 @@ jobs:
         fi
         chmod +x /tmp/bazelisk
         sudo mv /tmp/bazelisk /usr/local/bin/bazel
-        echo "USE_BAZEL_VERSION=6.1.0" >> $GITHUB_ENV
+        echo "USE_BAZEL_VERSION=6.5.0" >> $GITHUB_ENV
         bazel --version
 
     - name: Build the package

WORKSPACE

@@ -282,4 +282,4 @@ ml_metadata_workspace()
 
 # Specify the minimum required bazel version.
 load("@bazel_skylib//lib:versions.bzl", "versions")
-versions.check("6.1.0")
+versions.check("6.5.0")

ml_metadata/.bazelversion

@@ -11,4 +11,4 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-6.1.0
+6.5.0

ml_metadata/tools/docker_build/Dockerfile.manylinux2010

@@ -15,6 +15,6 @@
 # Dockerfile for building a manylinux2010 MLMD wheel.
 
 # This docker image is essentially pypa/manylinux2010 + bazel.
-FROM gcr.io/tfx-oss-public/manylinux2014-bazel:bazel-6.1.0
+FROM gcr.io/tfx-oss-public/manylinux2014-bazel:bazel-6.5.0
 WORKDIR /build
 CMD ["ml_metadata/tools/docker_build/build_manylinux.sh"]

ml_metadata/tools/docker_build/build_manylinux.sh

@@ -25,7 +25,7 @@
 WORKING_DIR=$PWD
 
 function setup_environment() {
-  source scl_source enable devtoolset-8
+  source scl_source enable devtoolset-10
   source scl_source enable rh-python38
   if [[ -z "${PYTHON_VERSION}" ]]; then
     echo "Must set PYTHON_VERSION env to 39|310|311|"; exit 1;