script: nexantic -> monogon

This replaces the 'nexantic' build container with one called 'monogon'.

Also drive-by fix Fietsje's proto package path.

Test Plan: Refactor, CI only.

X-Origin-Diff: phab/D687
GitOrigin-RevId: 15165f3b57927836dc9601454b31dce4b2c09c7d
diff --git a/scripts/bin/bazel b/scripts/bin/bazel
index b63e060..535eda5 100755
--- a/scripts/bin/bazel
+++ b/scripts/bin/bazel
@@ -8,4 +8,4 @@
 #
 ARGS=$(echo $@ | sed "s%--override_repository=intellij_aspect=[^ ]*%--override_repository=intellij_aspect=${HOME}/.cache/bazel-nxt/ijwb_aspect%")
 
-exec podman exec -it nexantic-dev bazel --output_user_root ${HOME}/.cache/bazel-nxt $ARGS
+exec podman exec -it monogon-dev bazel --output_user_root ${HOME}/.cache/bazel-nxt $ARGS