Switch to HaulBlobExporter and BridgeBlobDispatcher from polkadot repo

[svyatonik]

The fact that these types can't be used from outside is a bug. Right now we have a copy in the bridge-runtime-common crate. This copy shall be removed and the original XCM v3 PR shall be fixed so that the "all pub types in universal_exports.rs should be reexported from lib.rs".

[bkontur]

@svyatonik
Slava, I would love to take this as a good start to dive into xcm bridge messaging, ok?

[svyatonik]

@bkontur
Sure, imo it involves three steps:

1. opening separate PR some-branch -> gav-xcm-v3 with "all pub types in universal_exports.rs should be reexported from lib.rs". We may also ask if an isolated commit directly to the gav-xcm-v3 would work here;
2. updating our refs to the latest gav-xcm-v3
3. actually using those types. TBH I'm not sure if they are currently used in Rialto/RialtoParachain<>Milau - I've had too many troubles with using them back when we've been switching to the XCM messaging. This may take a while and require many changes. In any case - if you'll have troubles here, let's chat/discuss later

[EmmanuellNorbertTulbure]

@bkontur status on this one?

[EmmanuellNorbertTulbure]

When closing, the questions from the PR should be transferred into issue(s).
PR: #1813. (Reffering to the message weight and how many can be sent)

[bkontur]

@EmmanuellNorbertTulbure PR is closed and I guess, the only thing, which is not in any issue, is just this test: #1813 (comment)