Use bazelisk as a bazel launcher in Dockerfile

bazelisk [1] is a wrapper around bazel that allows you to use different
versions of bazel without having to install them all. This is useful
for testing different versions of bazel or for using a specific version
of bazel that is not available in the default repository.

Let's update Dockerfile to use bazelisk instead of bazel. This will
allow us to avoid a tricky question on which version of bazel should be
installed in the Docker container by checking in '.bazeliskrc' into the
repository.

Note that switching to recent versions of bazel is also necessary due to
our migration to bzlmod (#1002). Probably bazel 7.3 or later is
currently required to build Mozc with bazel.

 [1]: https://github.com/bazelbuild/bazelisk

#codehealth

PiperOrigin-RevId: 680750168

docker/ubuntu22.04/Dockerfile

@@ -49,21 +49,22 @@ RUN apt-get update && apt-get install -y \
     curl gnupg libncurses5 \
   && rm -rf /var/lib/apt/lists/*
 
-## For Bazel
-## https://bazel.build/install/ubuntu#install-on-ubuntu
-RUN curl -fsSL https://bazel.build/bazel-release.pub.gpg | gpg --dearmor > /usr/share/keyrings/bazel-archive-keyring.gpg
-RUN echo "deb [arch=amd64 signed-by=/usr/share/keyrings/bazel-archive-keyring.gpg] https://storage.googleapis.com/bazel-apt stable jdk1.8" | tee /etc/apt/sources.list.d/bazel.list
-RUN apt-get update && apt-get install -y bazel && rm -rf /var/lib/apt/lists/*
-
 # Working environemnt
 ENV HOME /home/mozc_builder
 RUN useradd --create-home --shell /bin/bash --base-dir /home mozc_builder
 USER mozc_builder
+RUN mkdir -p /home/mozc_builder/bin
+ENV PATH "${PATH}:/home/mozc_builder/bin"
 RUN mkdir -p /home/mozc_builder/work
 WORKDIR /home/mozc_builder/work
 ## Work around https://bugreports.qt.io/browse/QTBUG-86080 for Ubuntu 22.04
 ENV PKG_CONFIG_PATH="/home/mozc_builder/work/mozc/docker/ubuntu22.04/qt6-core-pkgconfig:${PKG_CONFIG_PATH}"
 
+## Set up bazelisk as bazel
+RUN curl -LO https://github.com/bazelbuild/bazelisk/releases/download/v1.22.0/bazelisk-linux-amd64 \
+  && mv bazelisk-linux-amd64 /home/mozc_builder/bin/bazel \
+  && chmod u+x /home/mozc_builder/bin/bazel
+
 ## Set up Android SDK and NDK
 ENV ANDROID_HOME /home/mozc_builder/Android/Sdk
 RUN mkdir -p ${ANDROID_HOME}

docker/ubuntu24.04/Dockerfile

@@ -54,10 +54,10 @@ ENV PATH "${PATH}:/home/mozc_builder/bin"
 RUN mkdir -p /home/mozc_builder/work
 WORKDIR /home/mozc_builder/work
 
-## Set up Bazel
-RUN curl -LO https://github.com/bazelbuild/bazel/releases/download/7.1.1/bazel-7.1.1-installer-linux-x86_64.sh \
-  && bash bazel-7.1.1-installer-linux-x86_64.sh --user \
-  && rm bazel-7.1.1-installer-linux-x86_64.sh
+## Set up bazelisk as bazel
+RUN curl -LO https://github.com/bazelbuild/bazelisk/releases/download/v1.22.0/bazelisk-linux-amd64 \
+  && mv bazelisk-linux-amd64 /home/mozc_builder/bin/bazel \
+  && chmod u+x /home/mozc_builder/bin/bazel
 
 ## Set up Android SDK and NDK
 ENV ANDROID_HOME /home/mozc_builder/Android/Sdk