[split] Refactor / cleanup — from #21

[RoniKishner]

Automated split from #21.

Context

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

Changes in this PR:

• utilities/unittests/test_console.py: Added imports: subprocess, pytest
• Added helper function _single_attempt_sampler for mocking TimeoutSampler
• Updated test_console_disconnect_terminated_child to mock _proc and call console_eof_sampler without arguments
• Updated test_console_eof_sampler_success assertions to reflect _spawn_console as function and removed command, timeout parameters
• Added new tests for _spawn_console method (success, Popen failure, fdspawn failure, process termination on failure)
• Added new tests for _terminate_proc method (running, already exited, timeout and kill)
• Added test for connect error cleanup behavior

How this split maps your changes

• Refactor branch (split-pr-21-1783450195-refactor): files classified as cleanup / mechanical work:
  • utilities/unittests/test_console.py
• Main branch (split-pr-21-1783450195-main): files classified as feature / behavior work:
  • utilities/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: #40