fix(hermesagent): shim handles hermes user invocation

runuser requires root. When the hermes user calls the shim directly
(e.g. via su - hermes), exec the binary directly instead.

install/hermesagent-install.sh

@@ -120,7 +120,11 @@ msg_info "Creating Hermes Shim"
 cat <<'EOF' >/usr/bin/hermes
 #!/bin/bash
 cd /home/hermes
-exec runuser -u hermes -- /home/hermes/.local/bin/hermes "$@"
+if [[ "$(id -u)" -eq 0 ]]; then
+  exec runuser -u hermes -- /home/hermes/.local/bin/hermes "$@"
+else
+  exec /home/hermes/.local/bin/hermes "$@"
+fi
 EOF
 chmod +x /usr/bin/hermes
 msg_ok "Created Hermes Shim"