Migrate to `Weight::from_parts` (#6794)

* Migrate to from_parts

Have a look at https://github.com/ggwpez/substrate-scripts/blob/master/migrate-from-parts.py



Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Adapt to master

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* update lockfile for {"substrate"}

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Signed-off-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: parity-processbot <>