Migration: Issuance and Dust fix

[lrazovic]

What, Why and How?

• DepositDust: After the fix on the dust (Feat/send dust to treasury #193) we have to deposit the dust wrongly burned to the Blockchain Operation Treasury.
• UnhashedMigration: At the TGE one account received a wrong VestingInfo, we need to adress this.

Testing

• Build the runtime with the try-runtime feature: cargo b -r -p polimec-base-runtime --features try-runtime
• Execute the Try Runtime CLI:

try-runtime \
  --runtime target/release/wbuild/polimec-base-runtime/polimec_base_runtime.compact.compressed.wasm \
  on-runtime-upgrade \
  live --uri wss://rpc.polimec.org:443

[vstam1]

Could chose to do 100_000_000 * PLMC - total_issuance instead of hard_coded values?

[lrazovic]

For the sake of transparency, I opted to hard-code the two values, which will always be visible in the two linked DustLost events. Obviously also 100_000_000 * PLMC - total_issuance is correct, but I find it less clear in this case

[JuaniRios]

Migration seems ok

[JuaniRios]

Code looks good. Ran it locally and it was ok