test: add tx priority checks to e2e tests

[skosito]

Description

Add function to monitor blocks while e2e tests are executed, and at the end of execution, n some block system transactions are not above ethermint txs, it should fail. Initially wanted to do this only for performance tests, but this seems more complete and better because one monitoring is needed per execution, not per test - open to discussion.

Monitor function is not super clean, but it is based on information in txs results.

These txs are on top because they have highest priority in mempool. If this is executed on develop before priority mempool PR was merged, it would fail, because txs were included in FIFO order.

Closes: #2182

Type of change

Test addition.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Include instructions and any relevant details so others can reproduce.

• Tested CCTX in localnet
• Tested in development environment
• Go unit tests
• Go integration tests
• Tested via GitHub Actions

Checklist:

• I have added unit tests that prove my fix feature works

[lumtis]

If we didn't yet, would be great if we could (at least manually)

• Toggle off the application mempool
• Checking the test no longer pass

[skosito]

@lumtis thanks for review, ready for 2nd pass

when NoOpMempool is used instead (which is previous version), tests fail on priority checks

this issue #2180 is not closed with this PR, i fixed it in previous and it is already merged, but lets open issue to update gosec to latest version, or rename this one from fix to update

[lumtis]

LGTM - minor comments