[split] Refactor / cleanup — from #21

[pull-apart]

Automated split from #21.

Context

This is the refactor / cleanup half of an automated split from #21.

Changes in this PR:

• utilities/console.py: Replaced usage of pexpect.spawn with pty.openpty() and subprocess.Popen for console process creation to avoid os.forkpty().
• Added _spawn_console method to encapsulate pty pair creation, subprocess spawning, and pexpect.fdpexpect.fdspawn wrapping.
• Added _terminate_proc method for graceful and forced shutdown of the console subprocess.
• Modified Console class to store subprocess.Popen object in a new _proc attribute.
• Updated connect method to use _spawn_console for console setup and call _terminate_proc on connection errors.
• Updated disconnect method to check _proc status and ensure _terminate_proc is called during cleanup.
• Simplified console_eof_sampler method signature by removing func, command, and timeout parameters.
• Changed console_eof_sampler to internally call _spawn_console instead of a generic func.
• Added imports for pty, shlex, subprocess, and pexpect.fdpexpect.
• Updated TimeoutSampler import to include TimeoutExpiredError.

How this split maps your changes

• Refactor branch (split-pr-21-1783401787-refactor): files classified as cleanup / mechanical work:
  • utilities/console.py
• Main branch (split-pr-21-1783401787-main): files classified as feature / behavior work:
  • utilities/unittests/test_console.py

Merge order

Merge the refactor PR first if it touches shared files or would conflict with the main PR; then merge the main PR. Resolve conflicts in the usual way if both branches touch the same lines.

Main PR: #34

[RoniKishner]

@pull-apart /close