ci(gpu): disable rapid streamer so the game downloads on macOS

The rapid streamer (streamer.cgi) fails on the macOS build's curl
(LibreSSL/SecureTransport, HTTP/2) with CURLE_RECV_ERROR, aborting the
game download with errorID 2 even though search/parse/SDP succeed. Set
PRD_RAPID_USE_STREAMER=false to use the plain per-file rapid path.

Author: Mearman

.github/workflows/macos-build-gpu.yml

@@ -309,6 +309,11 @@ jobs:
           # 2"). Point rapid and the HTTP map search at BAR's content network.
           export PRD_RAPID_REPO_MASTER="https://repos-cdn.beyondallreason.dev/repos.gz"
           export PRD_HTTP_SEARCH_URL="https://files-cdn.beyondallreason.dev/find"
+          # BAR's rapid streamer (streamer.cgi) fails on macOS curl
+          # (LibreSSL/SecureTransport, HTTP/2) with CURLE_RECV_ERROR, aborting
+          # the game download with errorID 2. Disable it so pr-downloader uses
+          # the plain per-file rapid path, which transfers fine.
+          export PRD_RAPID_USE_STREAMER=false
           cd "\$USER_DATA"
           exec "\$RES/bin/spring" --isolation-dir "\$USER_DATA" --menu "BYAR Chobby $LOBBY_VERSION" "\$@"
           LAUNCHER