process: add --no-reset-stdio option

[icecold009]

Fixes: #35536

Add a --no-reset-stdio option for processes that must preserve the terminal state established by the parent shell. The option state is copied into a lock-free atomic after command-line parsing because ResetStdio() can run from signal handlers.

Add a POSIX pseudo-TTY regression test covering terminal echo state after a child process exits.

Tests:

• git diff --check
• node --check test/pseudo-tty/test-no-reset-stdio.js
• Not run: the pseudo-TTY test requires a POSIX environment and a locally built Node.js binary.

[nodejs-github-bot]

Review requested:

• @nodejs/config
• @nodejs/startup

[github-actions]

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[MikeMcC399]

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[MikeMcC399]

There is a conflict in this PR. Please rebase the branch in this PR according to the Pull requests documentation.

[MikeMcC399]

Closing, as there has been no response to requests to change the PR.