chore: fix wasm file cache directory permission

tools/docker/envoy-gateway/Dockerfile

@@ -1,13 +1,13 @@
 FROM busybox@sha256:37f7b378a29ceb4c551b1b5582e27747b855bbfaa73fa11914fe0df028dc581f AS source
 # Create the data directory for eg
-RUN mkdir -p /var/lib/eg
+RUN mkdir -p /var/lib/eg && chmod -R 0777 /var/lib/eg
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
 FROM gcr.io/distroless/base-nossl:nonroot@sha256:ecbab76d6a504ddf7c58a9d786e70f1f1731fa546b1ac0b20dab35c6fc2f3138
 ARG TARGETPLATFORM
 COPY --chown=65532:65532 $TARGETPLATFORM/envoy-gateway /usr/local/bin/
-COPY --from=source --chown=65532:65532 /var/lib /var/lib
+COPY --from=source /var/lib /var/lib
 
 USER 65532:65532