freebsd: Improve nightly builds of zed-remote-server (#32255)

Follow-up to: https://github.com/zed-industries/zed/pull/29561

Don't create a release
Don't upload artifact to workflow.
Add freebsd support to upload-nightly

Release Notes:

- N/A

script/upload-nightly

@@ -4,7 +4,7 @@
 bash -euo pipefail
 source script/lib/blob-store.sh
 
-allowed_targets=("linux-targz" "macos")
+allowed_targets=("linux-targz" "macos" "freebsd")
 is_allowed_target() {
     for val in "${allowed_targets[@]}"; do
         if [[ "$1" == "$val" ]]; then
@@ -55,6 +55,9 @@ case "$target" in
         upload_to_blob_store $bucket_name "target/latest-sha" "nightly/latest-sha-linux-targz"
         rm -f "target/latest-sha"
         ;;
+    freebsd)
+        echo "No freebsd client build (yet)."
+        ;;
     *)
         echo "Error: Unknown target '$target'"
         exit 1