build: add bazel integration test (#18733)

It includes sass compilation, and building the bazel package
distribution.

PR Close #18733

scripts/ci/install.sh

@@ -61,7 +61,7 @@ if [[ ${TRAVIS} && (${CI_MODE} == "aio" || ${CI_MODE} == "aio_e2e" || ${CI_MODE}
 fi
 
 # Install bazel
-if [[ ${TRAVIS} && ${CI_MODE} == "bazel" ]]; then
+if [[ ${TRAVIS} && (${CI_MODE} == "bazel" || ${CI_MODE} == "e2e_2") ]]; then
   travisFoldStart "bazel-install"
   (
     mkdir tmp