Fix the nondeterminism sim to not fail when the validator set is empty.

[SpicyLemon]

Summary

Update the nondeterminism sim test (make test-sim-nondeterminism) so that, if it gets panic: validator set is empty after InitGenesis, ..., it can still pass.

Problem Definition

The nondeterminism sim picks a few random seeds each time it runs. That is different from the other sims that use a pre-defined list of seeds to use. But the result is intermittent failures when the randomness aligns a certain way.

One way it shows up is by getting a panic like this:

--- FAIL: TestAppStateDeterminism (105.78s)
panic: validator set is empty after InitGenesis, please ensure at least one validator is initialized with a delegation greater than or equal to the DefaultPowerReduction ({824644944992}) [recovered]
	panic: validator set is empty after InitGenesis, please ensure at least one validator is initialized with a delegation greater than or equal to the DefaultPowerReduction ({824644944992})

goroutine 9 [running]:
testing.tRunner.func1.2({0x3034cc0, 0xc002370fb0})
	/opt/hostedtoolcache/go/1.21.13/x64/src/testing/testing.go:1545 +0x238
testing.tRunner.func1()
	/opt/hostedtoolcache/go/1.21.13/x64/src/testing/testing.go:1548 +0x397
panic({0x3034cc0?, 0xc002370fb0?})
	/opt/hostedtoolcache/go/1.21.13/x64/src/runtime/panic.go:914 +0x21f
github.com/cosmos/cosmos-sdk/x/simulation.initChain(0xc001348f30?, {0x3fd09d6113f22504, _, _, {_, _, _}, {_, _}, {_, ...}}, ...)
	/home/runner/go/pkg/mod/github.com/provenance-io/[email protected]/x/simulation/simulate.go:48 +0x39f
github.com/cosmos/cosmos-sdk/x/simulation.SimulateFromSeedProv({_, _}, {_, _}, _, _, _, {0xc00bda8000, 0x5a, 0x80}, ...)
	/home/runner/go/pkg/mod/github.com/provenance-io/[email protected]/x/simulation/simulate.go:99 +0x4ef
github.com/cosmos/cosmos-sdk/x/simulation.SimulateFromSeed(...)
	/home/runner/go/pkg/mod/github.com/provenance-io/[email protected]/x/simulation/simulate.go:68
github.com/provenance-io/provenance/app.TestAppStateDeterminism(0xc000c7fa00)
	/home/runner/work/provenance/provenance/app/sim_test.go:591 +0xc0d
testing.tRunner(0xc000c7fa00, 0x5130fb8)
	/opt/hostedtoolcache/go/1.21.13/x64/src/testing/testing.go:1595 +0xff
created by testing.(*T).Run in goroutine 1
	/opt/hostedtoolcache/go/1.21.13/x64/src/testing/testing.go:1648 +0x3ad
FAIL	github.com/provenance-io/provenance/app	105.858s
FAIL

That was the result from seed 7069437441164333710.

I thought there were things already in place to handle that specific panic, but either they aren't being applied to the nondeterminism test or else it's not being applied correctly.

Proposal

Update the nondeterminism sim test to handle that specific panic. Hopefully, we can make it just eat the panic and move on to the rest of the test process allowing it to run the needed comparisons and pass/fail based on that. If eating that panic will always cause another failure, though, we're probably fine leaving things as is. But we'll have to dig into it to know for sure.

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