test(p2p/test/transport/transport_test.go): Add IPv6 tests to transpo…

[varun-r-mallya]

Add IPv6 tests to transport integration tests

Should ideally fix #2510 after completion

[p-shahi]

@varun-r-mallya Please take a look at the build failures

[varun-r-mallya]

@p-shahi this should pass the required tests now. Please allow the workflow to run.

[varun-r-mallya]

@p-shahi I see that interop tests are failing for some reason here. I have been running go test transport_test.go on the code that I write and they seem to pass. Can I please know what is the testing method to be actually used ?

[sukunrt]

@varun-r-mallya You can reopen PR once you address the build failures. If you need help with this, you can use the libp2p-implementers channel on the filecoin slack.