Describe the bug

Code is here:

The docstring states that the function "[r]etrieves total the liquidity of a pool" but an examination of the code reveals that it instead gets the active liquidity, not total liquidity. Active liquidity is fine but the doscstring is misleading.

Expected Behavior

Expected behavior is that the function would return the total liquidity.

To Reproduce

It's a lot of overhead to show it in code (you can just look at what the source does) but it can be confirmed by doing the following:

1. Make a new, empty pool with some starting price with tick t.
2. Add single-sided liquidity at tick t' where t != t'.
3. Check that tokens were moved into the pool manager via getBalance.
4. Call StateLibrary.getLiquidity(). It will return 0 since the current price/tick is not in the range of liquidity added.

Obviously one must take are that t' is not in the same tick-spacing-bin as t.

Additional context

No response