tests: independent precisebank

[nowooj]

Description

I am declaring it as below and fixing the cases where GetPreciseBankKeeper is called even though it is nil.

// app.go

func (app *EVMD) GetPreciseBankKeeper() *precisebankkeeper.Keeper {
	return nil
}

I think the following modifications remain:

• tests/integration/precompiles/erc20
• tests/integration/precompiles/staking
• tests/integration/precompiles/werc20
• tests/integration/precompiles/ics20
• tests/integration/mempool
• test/...

Closes: #716

I've tried removing dependencies, but there are too many things to fix, so I'm going to prioritize other urgent tasks. I hope someone will continue to work on the code base.

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Author Checklist

I have...

• tackled an existing issue or discussed with a team member
• left instructions on how to review the changes
• targeted the main branch