Adding disable host otel tracing

Author: JoeColeman95

lib/shared.bash

@@ -41,6 +41,11 @@ function plugin_read_config() {
   echo "${!var:-$default}"
 }
 
+# Disable OTEL tracing for host-side commands
+if [[ "$(plugin_read_config DISABLE_HOST_OTEL_TRACING "false")" == "true" ]] ; then
+  export OTEL_SDK_DISABLED=true
+fi
+
 # Reads either a value or a list from plugin config
 function plugin_read_list() {
   prefix_read_list "BUILDKITE_PLUGIN_DOCKER_COMPOSE_$1"