reduce tests image size and build time (#14519)

* reduce tests image size and reduce re-build time

* address suggestions

* resolve conflict

integration-tests/test.Dockerfile

@@ -2,16 +2,26 @@ ARG BASE_IMAGE
 ARG IMAGE_VERSION=latest
 FROM ${BASE_IMAGE}:${IMAGE_VERSION} AS build-env
 
-ARG SUITES=chaos migration performance reorg smoke soak benchmark load ccip-load
-
-COPY . testdir/
 WORKDIR /go/testdir
+RUN mkdir -p /go/testdir/integration-tests/load
+COPY go.mod go.sum  ./
+COPY integration-tests/go.mod integration-tests/go.sum ./integration-tests/
+COPY integration-tests/load/go.mod integration-tests/load/go.sum ./integration-tests/load/
+RUN cd integration-tests && go mod download
+RUN cd integration-tests/load && go mod download
+
+COPY . .
+
+ARG SUITES=chaos soak benchmark load ccip-load
+
 RUN /go/testdir/integration-tests/scripts/buildTests "${SUITES}"
 
 FROM ${BASE_IMAGE}:${IMAGE_VERSION}
 
 RUN mkdir -p /go/testdir/integration-tests/scripts
-COPY --from=build-env /go/pkg /go/pkg
+# Dependency of CosmWasm/wasmd
+COPY --from=build-env /go/pkg/mod/github.com/\!cosm\!wasm/wasmvm@v*/internal/api/libwasmvm.*.so /usr/lib/
+RUN chmod 755 /usr/lib/libwasmvm.*.so
 COPY --from=build-env /go/testdir/integration-tests/*.test /go/testdir/integration-tests/
 COPY --from=build-env /go/testdir/integration-tests/ccip-tests/*.test /go/testdir/integration-tests/
 COPY --from=build-env /go/testdir/integration-tests/scripts /go/testdir/integration-tests/scripts/