Optimize topic weights fetch and update flow

[guilherme-brandao]

Purpose of Changes and their Description

• Remove repeated and unnecessary fetches for the module params and topic structure during the topic GetCurrentTopicWeight and DripTopicFeeRevenue

Link(s) to Ticket(s) or Issue(s) resolved by this PR

No ticket was created for this. This optimization opportunity was found during the execution of this ticket:
https://linear.app/alloralabs/issue/ENGN-3608/test-topic-weight-changes

Are these changes tested and documented?

• If tested, please describe how. If not, why tests are not needed.
• If documented, please describe where. If not, describe why docs are not needed.
• Added to Unreleased section of CHANGELOG.md?

[xmariachi]

small change but otherwise lgtm

[amimart]

Just small remarks I'll let up to you

[xmariachi]

Needs fixing linter and compilation is failing in tests, otherwise it lgtm.

# github.com/allora-network/allora-chain/x/emissions/keeper_test [github.com/allora-network/allora-chain/x/emissions/keeper.test]
Error: x/emissions/keeper/keeper_test.go:4747:45: not enough arguments in call to k.DripTopicFeeRevenue
	have ("github.com/cosmos/cosmos-sdk/types".Context, uint64, int64)
	want ("github.com/cosmos/cosmos-sdk/types".Context, "github.com/allora-network/allora-chain/x/emissions/types".Topic, "github.com/allora-network/allora-chain/math".Dec, "github.com/allora-network/allora-chain/x/emissions/keeper".BlockHeight)
Error: x/emissions/keeper/keeper_test.go:4750:45: not enough arguments in call to k.DripTopicFeeRevenue
	have ("github.com/cosmos/cosmos-sdk/types".Context, uint64, int64)

[xmariachi]

Add to changelog, otherwise lgtm, good work