Deploy UE5 nightly to Cloudflare R2 (#9859)

Switch the deploy endpoint from Backblaze B2 to the Cloudflare R2
bucket serving downloads.carlasim.com; the AWS_* repository secrets
now hold the R2 credentials. Point the nightly download link and the
CI summary URL at the public download domain.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: germanros1987

Docs/download.md

@@ -10,7 +10,7 @@ This is an automated build with the latest changes pushed to our `ue5-dev`
 branch. It contains the very latest fixes and features that will be part of the
 next release, but also some experimental changes. Use at your own risk!
 
-- [CARLA Nightly Build (Linux)](https://s3.us-east-005.backblazeb2.com/carla-releases/Linux/Dev/CARLA_UE5_Latest.tar.gz)
+- [CARLA Nightly Build (Linux)](https://downloads.carlasim.com/Linux/Dev/CARLA_UE5_Latest.tar.gz)
 
 <p><a id="last-run-link" href='https://github.com/carla-simulator/carla/actions'>Last successful build</a>: <span id="last-run-time" class="loading">Loading...</span></p>
 

Util/Tools/Deploy.sh

@@ -8,7 +8,7 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
 REPLACE_LATEST=false
 AWS_COPY="aws s3 cp"
-ENDPOINT="https://s3.us-east-005.backblazeb2.com"
+ENDPOINT="https://1b808339cbe94fecce530dfada93713b.r2.cloudflarestorage.com"
 SUMMARY_OUTPUT_PATH=
 
 # ==============================================================================
@@ -68,9 +68,9 @@ fi
 NIGHTLY_DEPLOY_NAME=$(git log --pretty=format:'%cd_%h' --date=format:'%Y%m%d' -n 1).tar.gz
 LATEST_DEPLOY_NAME="CARLA_UE5_Latest.tar.gz"
 
-# Backblaze bucket paths
+# Cloudflare R2 bucket paths
 S3_PREFIX=s3://carla-releases/Linux
-URL_PREFIX=${ENDPOINT}/carla-releases/Linux
+URL_PREFIX=https://downloads.carlasim.com/Linux
 
 NIGHTLY_DEPLOY_URI=${S3_PREFIX}/Dev/${NIGHTLY_DEPLOY_NAME}
 LATEST_DEPLOY_URI=${S3_PREFIX}/Dev/${LATEST_DEPLOY_NAME}