feat: allow skipping the install trigger when installing a plugin

During docker image generation, certain folders either do not exist or are symlinked in an odd fashion, causing the install trigger to fail. This is not the case at runtime, so we should defer the install trigger until container start and provide a method of skipping it when generating a docker image.

Closes #7308

plugins/plugin/functions

@@ -33,6 +33,7 @@ download_and_enable_plugin() {
   declare desc="wrapper to download and enable specified version of plugin"
   local PLUGIN_GIT_URL="$1"
   shift
+  local SKIP_INSTALL_TRIGGER=false
   while getopts ":-:" opt "$@"; do
     case "$opt" in
       -)
@@ -47,6 +48,9 @@ download_and_enable_plugin() {
             OPTIND=$((OPTIND + 1))
             local CUSTOM_NAME="$val"
             ;;
+          skip-install-trigger)
+            SKIP_INSTALL_TRIGGER=true
+            ;;
         esac
         ;;
     esac
@@ -58,6 +62,9 @@ download_and_enable_plugin() {
   if [[ -n "$PLUGIN_COMMITTISH" ]]; then
     update_plugin "$PLUGIN_NAME" "$PLUGIN_COMMITTISH"
   fi
+  if [[ "$SKIP_INSTALL_TRIGGER" == "false" ]]; then
+    plugn trigger install
+  fi
 }
 
 update_plugin() {