Map `cloneId` to it's index in Clone List

[calvbore]

• Maps the clone ID to it's index in the linked list.
• Reconfigure dissolve() to take protoId and cloneId as args.
• Remove index as arg in dissolve().
• Update tests to reflect changes in dissolve().

This update should make it easier for for the dissolve() function to be composable with external contracts.

[0xbok]

lgtm