Reuse code for parsing integer slices from string

[ValarDragon]

There are several places in the codebase (CLI folders) where we ad-hoc write parsing of a comma-delimited string into []uint64 ro []sdk.Int. We should have a single method we call for this, not ad-hoc implemented in line.

The function for []uint64 is written here:

osmosis/cmd/osmosisd/cmd/balances_from_state_export.go

Lines 343 to 358 in 8342388

	// TODO: move somewhere common, make more commands use it
	func parseUint64SliceFromString(s string, seperator string) ([]uint64, error) {
	var ids []uint64
	for _, s := range strings.Split(s, seperator) {
	s = strings.TrimSpace(s)
	base := 10
	bitlen := 64
	parsed, err := strconv.ParseUint(s, base, bitlen)
	if err != nil {
	return []uint64{}, err
	}
	ids = append(ids, parsed)
	}
	return ids, nil
	}

We should move that function and write one for SDK.Int in
https://github.com/osmosis-labs/osmosis/blob/main/osmotestutils/cli_helpers.go

We should then switch balances_from_state_export, and pool incentives CLI's to use this.

This is implemented in-line in the pool-incentives CLI code here: https://github.com/osmosis-labs/osmosis/blob/main/x/pool-incentives/client/cli/tx.go#L49-L69 & https://github.com/osmosis-labs/osmosis/blob/main/x/pool-incentives/client/cli/tx.go#L143-L163

[p0mvn]

Looking into this...

[iButcat]

Oups sorry, I forgot to say I was on this as well. @akhtariev

[p0mvn]

Ok, no worries @iButcat

[iButcat]

@ValarDragon, Hi, I think that's good, can you review my PR please ?