Snowbridge westend migration(no need to merge)

[yrong]

Description

A workaround for #5747 call System.set_storage to initialize the channels from sudo directly without runtime upgrade.

Btw: This PR is mainly for building the sudo call with test code, just for review and no need to merge.

[yrong]

Sudo Call on Westend

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

[acatangiu]

#5786 has been merged and will be included in upcoming release at end of the week. We can then upgrade and run the migration you added.

Do you need this before then?

[yrong]

Do you need this before then?

Ideally. I'll be absent from next week so would prefer some tests this week. I think maybe a bit easier to make a sudo call than the runtime upgrade required.

@acatangiu Do you think it's fine if I ask someone in Westend Devops channel to send the encoded call directly?

[acatangiu]

Do you need this before then?

Ideally. I'll be absent from next week so would prefer some tests this week. I think maybe a bit easier to make a sudo call on westend than the runtime upgrade required.

@acatangiu Do you think it's fine if I ask someone in Westend Devops channel to send the encoded call directly?

ok, go for it