feat: Integration tests enhancement for L1

[Artemka374]

What ❔

Make tests send transactions subsequently, use Promise.all() only on waiting receipt. Add more logging Increase gas price by 30% to prevent test timeout

Why ❔

Integrationg tests for L1 are not working properly.

Checklist

• [ ] PR title corresponds to the body of PR (we generate changelog entries from PRs).
• [ ] Tests for the changes have been added / updated.
• [ ] Documentation comments have been added / updated.
• [ ] Code has been formatted via zk fmt and zk lint.
• [ ] Spellcheck has been run via zk spellcheck.
• [ ] Linkcheck has been run via zk linkcheck.

[RomanBrodetski]

@popzxc please have a look at this and if possible assist @Artemka374 on this further