chore(ci): fix interop tests region, and run them again on each PR (#5666)

Author: jxs

.github/workflows/interop-test.yml

@@ -1,5 +1,6 @@
 name: Interoperability Testing
 on:
+  pull_request:
   push:
     branches:
       - "master"

scripts/build-interop-image.sh

@@ -6,13 +6,13 @@ CACHE_TO=""
 
 # If we have credentials, write to cache
 if [[ -n "${AWS_SECRET_ACCESS_KEY}" ]]; then
-  CACHE_TO="--cache-to   type=s3,mode=max,bucket=${AWS_BUCKET_NAME},region=us-east-1,prefix=buildCache,name=${FLAVOUR}-rust-libp2p-head"
+  CACHE_TO="--cache-to   type=s3,mode=max,bucket=${AWS_BUCKET_NAME},region=ap-southeast-2,prefix=buildCache,name=${FLAVOUR}-rust-libp2p-head"
 fi
 
 docker buildx build \
   --load \
   $CACHE_TO \
-  --cache-from type=s3,mode=max,bucket=${AWS_BUCKET_NAME},region=us-east-1,prefix=buildCache,name=${FLAVOUR}-rust-libp2p-head \
+  --cache-from type=s3,mode=max,bucket=${AWS_BUCKET_NAME},region=ap-southeast-2,prefix=buildCache,name=${FLAVOUR}-rust-libp2p-head \
   -t ${FLAVOUR}-rust-libp2p-head \
   . \
   -f interop-tests/Dockerfile.${FLAVOUR}