Ensure e2e test uses "test" chain ID

[rootulp]

Context

#4065

Motivation

In a call today, we weren't sure if the end-to-end test uses the "test" chain ID

Proposal

Ensure that the end-to-end test for upgrading to v3 uses the "test" chain ID

[rootulp]

There are 4 e2e tests:

1. MinorVersionCompatibility
2. MajorUpgradeToV2
3. MajorUpgradeToV3
4. E2ESimple

We only care about MajorUpgradeToV3 using the test chain ID.

One thing worth noting: each block that the knuu network produces only contains 1 tx so I expect it will take a while for txsim to randomly submit a MsgSignalUpgrade 3 and then a subsequent MsgTryUpgrade

[evan-forbes]

knuu network produces only contains 1 tx

do you know why this is? is it just because we're running one txsim?

[rootulp]

Not sure. I expected txsim to submit more than one tx per block but I could be wrong