[CI/CD] Restored awscli process for update-debian-oldstable-packages.

The `s3fs` flow seems to have problems on the Debian oldstable image.

.drone.yml

@@ -432,13 +432,11 @@ steps:
 
 - name: update-debian-oldstable-packages
   image: debian:oldstable
-  privileged: true  # Required to use the FUSE module for s3fs
   environment:
     DEB_VERSION: oldstable
     WORKDIR: /tmp/workdir
     PKG_NAME: platypush
-    S3_BUCKET: platypush-pkg
-    BUCKET_MNT: /mnt/s3
+    S3_URL: s3://platypush-pkg/apt
     AWS_ENDPOINT_URL: https://s3.nl-ams.scw.cloud
     AWS_DEFAULT_REGION: nl-ams
     AWS_ACCESS_KEY_ID:
@@ -464,12 +462,8 @@ steps:
 
     - echo "-- Installing dependencies"
     - apt update
-    - apt install -y curl dpkg-dev gpg git python3 python3-pip s3fs
-
-    - echo "-- Mounting the S3 bucket"
-    - mkdir -p "$BUCKET_MNT"
-    - s3fs "$S3_BUCKET" "$BUCKET_MNT" -o url="$AWS_ENDPOINT_URL"
-    - export APT_ROOT="$BUCKET_MNT/apt"
+    - apt install -y curl dpkg-dev gpg git python3 python3-pip
+    - pip install awscli
 
     - echo "--- Parsing metadata"
     - git config --global --add safe.directory $PWD
@@ -501,8 +495,7 @@ steps:
     - dpkg --build "$GIT_BUILD_DIR"
 
     - echo "--- Pushing package to the S3 bucket"
-    - mkdir -p "$APT_ROOT/pool/$DEB_VERSION/dev"
-    - cp "$GIT_DEB" "$APT_ROOT/pool/$DEB_VERSION/dev/"
+    - aws s3 cp "$GIT_DEB" "$S3_URL/pool/$DEB_VERSION/dev/"
 
     # If main/all/Packages doesn't exist, then we should create the first main release
     - export PKGURL="https://apt.platypush.tech/dists/$DEB_VERSION/main/all/Packages"