[CL][Concentrated Liquidity Module]: implement InitializePool

[p0mvn]

Background

We need to implement and test this method:

osmosis/x/concentrated-liquidity/keeper.go

Line 28 in 70f67d9

func (k Keeper) InitializePool(ctx sdk.Context, pool swaproutertypes.PoolI, creatorAddress sdk.AccAddress) error {

This method should replace CreateNewConcentratedLiquidityPool since the only valid entry point for pool creation is InitializePool

Spec for it:

// InitializePool initializes the pool by running concentrated-liquidity specific initialization logic that includes:
// * minting liquidity share to the sender
// * saving the pool to state
// Returns nil on success, error otherwise

Suggested Design

• Remove CreateNewConcentratedLiquidityPool method
• In tests, replace all calls to it with the calls to swaprouter's CreatePool by suppling a CL CreatePoolMsg
• Implement InitializePool
• Test InitializePool
• Add apptesting helpers for creationg CL pools via swaprouter

Acceptance Criteria

• CreateNewConcentratedLiquidityPool is removed
  • All pre-existing callers go through swaprouter
  • In tests, apptesting helpers are utilized
• InitializePool is implemented and tested
• Helpers in apptesting created
• New and old tests pass

[p0mvn]

This is blocked on: #3245 being implemented first