Adjusting the Mint module for dymint

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Overview
We need to examine the effects of the param: BlocksPerYear from the Mint module. cosmos/cosmos-sdk#5411 (comment). Most RDK changes need to consider dymint as every parameter induces some security concerns.

Motivation
The initial motivation for creating the BlockPerYear cosmos/cosmos-sdk#5411 (comment). We need to understand the potential attack vectors in a single sequencer and a multi-sequencer rotation.

Action Items
There are currently no proposed changes to the original Cosmos SDK BlockPerYear, however, this will need to be re-visited and tested under various assumptions.