[Uptime Incentives]: Incorporate gov param in distribution logic

[AlpinYukseloglu]

Background

Once the gov param for internal incentives uptime is set up, we should ensure that the logic described in [issue above] is executed properly.

Suggested Design

This component should be quite straightforward to implement due to the decisions made in #7369, as properly handling internal gauge distributions would suffice to achieve the above. Specifically, adding a check to distributeInternal here:

osmosis/x/incentives/keeper/distribute.go

Line 589 in 7c81b90

if gauge.DistributeTo.LockQueryType == lockuptypes.NoLock {

that replaces gaugeTime with the gov param value if it is an internal gauge (& falls back to default if gov param is invalid) should work well. This check should be straightforward to do with logic similar to the following:

osmosis/x/incentives/keeper/gauge.go

Line 158 in 7c81b90

if distrToDenom != types.NoLockInternalGaugeDenom(poolId) {

Specifically, add the following logic under the first section above:

isInternalGauge := gauge.DistributeTo.Denom == types.NoLockInternalGaugeDenom(pool.GetId())
if isInternalGauge {
	gaugeTime = k.GetParams(ctx).InternalUptime
}

Testing Strategy

Add the following to existing distributeInternal tests related to CL/NoLock gauges:

• Empty gov param on internal gauge
• Gov sets a value (should distribute to that uptime)
• Gov sets a value and then changes it next epoch (2nd epoch distribution should be on the new uptime)
• Gov sets value a supported but unauthorized uptime (should still work)
• Gov sets value to an unsupported uptime (should not be possible, but if we sudo set params, it should fall back to default)

Acceptance Criteria

• Gov param is tied into core logic as described and well tested