x/incentives: refactor create gauge and add to gauge fees to use txfees denom

[p0mvn]

Background

In #2227, we hard coded the fee denom for create gauge and add to gauge fees. This was done to minimize the changes for a smooth and expedited v11 release.

However, the hard-coded denom causes issues with the simulator. Simulator assumes "stake" denom for majority of its tests by default. As a result, no account has the hard coded "uosmo" denom to pay the fee.

We had to disable simulator in the incentives tests for now.

Suggested Design

We should revert the following 3 commits separately and avoid backporting them to v11.x:

• 100b693
• 915e9ff
• 87dd1fe

Acceptance Criteria

• create gauge and add to gauge fee uses denom from the txfees keeper
• simulator incentives tests function correctly

[stackman27]

Hi @p0mvn is this being worked on?

[p0mvn]

Hi @stackman27 . No, please feel free to take this if you'd like