qa-tests: change RPC Integration Latest test trigger

[mriccobene]

This test requires that, when starting Erigon from a synced DB, it reach the tip within a few minutes.
This does not seem to be true. So, temporarily, we change the test trigger:

• run nightly in main,
• run on every push in release

[Copilot]

Pull request overview

Updates the QA RPC Integration “Latest” GitHub Actions workflow trigger strategy to reduce signal noise from a test that currently doesn’t reliably reach tip quickly when starting from a synced DB.

Changes:

• Add a scheduled run and restrict push-based runs to release/3.* branches.
• Remove pull_request triggers for main.
• Increase TOTAL_TIME_SECONDS from 900s to 1800s for tip-chasing.

Comments suppressed due to low confidence (1)

.github/workflows/qa-rpc-integration-tests-latest.yml:33

• This PR also increases TOTAL_TIME_SECONDS from 900s to 1800s, but the PR description only mentions changing the trigger conditions. Please either document this runtime increase in the PR description (or in a comment near the variable) or split it into a separate change so it’s clear why the timeout is being adjusted.

      ERIGON_QA_PATH: /home/qarunner/erigon-qa
      TOTAL_TIME_SECONDS: 1800 # 30 minutes
      REFERENCE_SYSTEM_HOST_ADDRESS: 157.180.55.78:8545

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