build: silencing info logspam. (envoyproxy#21073)

Signed-off-by: Alyssa Wilk <alyssar@chromium.org>

.bazelrc

@@ -21,6 +21,7 @@ build --tool_java_runtime_version=remotejdk_11
 build --platform_mappings=bazel/platform_mappings
 # silence absl logspam.
 build --copt=-DABSL_MIN_LOG_LEVEL=4
+build --ui_event_filters=-info
 
 # Pass PATH, CC, CXX and LLVM_CONFIG variables from the environment.
 build --action_env=CC --host_action_env=CC