Merge bitcoin/bitcoin#32044: ci: Revert "Temporary workaround for old CCACHE_DIR cirrus env"

fa21597 ci: Revert "Temporary workaround for old CCACHE_DIR cirrus env" (MarcoFalke)

Pull request description:

  Seems fine to revert this now. If this still happens it should be rare enough and trivial to fix via a new push (normal push, force-push, rebase, ...), or to just ignore the failure.

ACKs for top commit:
  fanquake:
    ACK fa21597

Tree-SHA512: 125946dcd4025b04f11276e1df1e0f1b361fc2deed2e3919d680d58df97e6d82881b21c0c683142df6995226b4c12b2dde5415ad78474b8fcda115cc69fa0207

Author: fanquake

ci/test/02_run_container.sh

@@ -94,16 +94,11 @@ if [ -z "$DANGER_RUN_CI_ON_HOST" ]; then
   fi
 
   if [ "$DANGER_CI_ON_HOST_CCACHE_FOLDER" ]; then
-   # Temporary exclusion for https://github.com/bitcoin/bitcoin/issues/31108
-   # to allow CI configs and envs generated in the past to work for a bit longer.
-   # Can be removed in March 2025.
-   if [ "${CCACHE_DIR}" != "/tmp/ccache_dir" ]; then
     if [ ! -d "${CCACHE_DIR}" ]; then
       echo "Error: Directory '${CCACHE_DIR}' must be created in advance."
       exit 1
     fi
     CI_CCACHE_MOUNT="type=bind,src=${CCACHE_DIR},dst=${CCACHE_DIR}"
-   fi # End temporary exclusion
   fi
 
   docker network create --ipv6 --subnet 1111:1111::/112 ci-ip6net || true