Move docker files to test

Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25091)

.github/workflows/build_quic_interop_container.yml

@@ -17,7 +17,7 @@ jobs:
           docker login -u openssl-ci+machine -p ${{ secrets.QUAY_IO_PASSWORD }} quay.io
       - name: "Build container"
         run: |
-          cd interop/quic-openssl-docker/
+          cd test/quic-openssl-docker/
           docker build -t quay.io/openssl-ci/openssl-quic-interop:latest .
       - name: "Push to quay"
         run: |