Feat: proxygasmeter for tokenfactory

[pr0n00gler]

Backport of MANTRA-Chain/mantrachain#438

[swelf19]

It looks like there is a small bug here.
If consumed exceeds the new limit, then:

We will get a panic at line L73.

The consumed gas will not be recorded in the gas meter (L76).

As a result, both methods - IsPastLimit and IsOutOfGas - will return false after recovering from the panic, which doesn't seem correct.
You can verify this with a test.

func TestProxyGasMeter2(t *testing.T) {
	baseGas := uint64(1000)
	limit := uint64(100)

	bgm := storetypes.NewGasMeter(baseGas)
	bgm.ConsumeGas(500, "ff")
	pgm := NewProxyGasMeter(bgm, limit)

	require.Panics(t, func() {
		pgm.ConsumeGas(101, "")
	})
	require.True(t, pgm.IsOutOfGas())
}

Suggestion: change the execution order and remove addUint64Overflow, since overflow checking is already performed in the parent gas meter.

Suggested change

	pgm.GasMeter.ConsumeGas(amount, descriptor)
	pgm.GasMeter.ConsumeGas(amount, descriptor)
	if pgm.GasConsumed() > pgm.limit {
	panic(storetypes.ErrorOutOfGas{Descriptor: descriptor})
	}

As in the parent method, we first record the consumption and then check the limits.