examples: move alts bazel and rm alts from pom.xml

diff --git a/buildscripts/kokoro/bazel.sh b/buildscripts/kokoro/bazel.sh
index 13bbaa4..56133d9 100755
--- a/buildscripts/kokoro/bazel.sh
+++ b/buildscripts/kokoro/bazel.sh
@@ -7,4 +7,9 @@
 bazel build ...
 
 cd examples
+bazel clean
+bazel build ...
+
+cd example-alts
+bazel clean
 bazel build ...