Build a new bazel docker image

This is necessary because the new rules_go and gazelle versions require
a version of bazel newer than what's in the GCR docker image pre-built
by the bazel team. Apparently, they stopped building those in 2020.

bazelbuild/continuous-integration#1060

Signed-off-by: Chris Koch <chrisko@google.com>

.circleci/config.yml

@@ -36,10 +36,10 @@ templates:
 
   bazel-template: &bazel-template
     docker:
-      - image: l.gcr.io/google/bazel:latest
-    working_directory: /go/bazel_gobusybox
+      - image: us-docker.pkg.dev/u-root-ci/gobusybox/test-bazel:v0.0.1
+    working_directory: /home/circleci/go/bazel_gobusybox
     environment:
-      - GOPATH: "/go"
+      - GOPATH: "/home/circleci/go"
     resource_class: large
 
   build-gomod-template: &build-gomod-template

.circleci/images/test-bazel/Dockerfile

@@ -0,0 +1,11 @@
+
+FROM cimg/base:2022.03
+
+RUN sudo apt install apt-transport-https curl gnupg;          \
+    curl -fsSL https://bazel.build/bazel-release.pub.gpg |    \
+          gpg --dearmor > bazel.gpg;                          \
+    sudo mv bazel.gpg /etc/apt/trusted.gpg.d/;                \
+    echo "deb [arch=amd64] https://storage.googleapis.com/bazel-apt stable jdk1.8" | sudo tee /etc/apt/sources.list.d/bazel.list;
+
+RUN sudo apt-get update &&                                    \
+    sudo apt-get install -y --no-install-recommends bazel;