WIP: Westend like Polkadot should have 10 decimal places

[gilescope]

We fixed up the polkadot-js chain properties for polkadot like networks so there were no surprises when testing polkadot teleporting in this PR: #5369

We should do this for Westend also. Westend is the testbed for Polkadot and so should have 10 decimal places like Polkadot.
(Not doing this would be leaving a footgun around for someone in the future.)

[chevdor]

cc @mordamax

[chevdor]

It will boil down to whether Westend is a tesnet for Polkadot, Kusama or simply a chain of its own.
I would tend to the later.

This change can potentially introduce a mess for downstream projects that don't check the decimals of the network, which can be seen as a positive point :)

Also Blockchain explorers will need to redo the jazz about wnd and old_wnd and my guess is that most people would prefer to avoid that effort for a test network.

[gilescope]

Hmm the x100 isn't happening doing the teleport between westmint and westend so that means that there's another additional way in which it's not like polkadot. We should not merge just this as it's necessary but not sufficient.

[gilescope]

Westend did not do the re-denomination when polkadot did. It does not make sense to do this alone.

[gilescope]

Joe mentioned that we should point exchanges at the re-denomination details when this change is rolled out to westend.