network layer should not have forceful read

[Mzack9999]

Proposed changes

This PR makes network final read optional, since it's up to the application protocol level to define which interactions requires a final recv operation. All C2 templates and those based only on network variables are currently broken if the server doesn't send any data.

Closes #4518

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)