chore: enable testing against nim-libp2p in multidim tests (#2617)

nim broke compatibility a while back, re-enable tests to see if it
has been restored.

Author: achingbrain

.github/workflows/main.yml

@@ -210,7 +210,6 @@ jobs:
       - uses: libp2p/test-plans/.github/actions/run-interop-ping-test@master
         with:
           test-filter: js-libp2p-head
-          test-ignore: nim
           extra-versions: ${{ github.workspace }}/interop/node-version.json ${{ github.workspace }}/interop/chromium-version.json ${{ github.workspace }}/interop/firefox-version.json
           s3-cache-bucket: ${{ vars.S3_LIBP2P_BUILD_CACHE_BUCKET_NAME }}
           s3-access-key-id: ${{ vars.S3_LIBP2P_BUILD_CACHE_AWS_ACCESS_KEY_ID }}