test: Improve tests robustness

[UdjinM6]

Issue being fixed or feature implemented

1. The original idea behind forced reset was to help desktop clients which go into sleep/hibernation mode from time to time to sync with no issues once they are online again. For regtest however it doesn't do anything good and only causes issues.
2. We rely on schedulers a lot, bumping them should let nodes behave more like on a real network.
3. Forcing mnsync to skip governance votes doesn't always work as we'd expect cause we don't control connection creation. To make it more deterministic create a proposal that should get into one superblock only. This way both the proposal and the trigger will expire/be deleted after another superblock meaning we can be 100% sure the isolated node never gets any of them and can only sync thanks to chainlock.

What was done?

How Has This Been Tested?

run tests

Breaking Changes

n/a

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation
• I have assigned this pull request to a milestone (for repository code-owners and collaborators only)

[PastaPastaPasta]

utACK 1e7544e

[github-actions]

This pull request has conflicts, please rebase.

[knst]

utACK 0c51794