On Windows, messages containing \r\n newlines caused broken block
output because the \r was captured by the regex in OutputWrapper::wrap()
and then an additional \r\n was appended, resulting in \r\r\n sequences.
This normalizes line endings to \n before wrapping and splitting.

When exec/fork is disallowed (e.g. via sudo NOEXEC), shell_exec()
generates a PHP warning even though the function exists. The existing
function_exists check does not cover this case.

Add the @ error suppression operator, consistent with how proc_open
is already called in readFromProcess in the same component.

Fixes #61225

…esses

…ltiple processes (guillaumeVDP)

This PR was squashed before being merged into the 6.4 branch.

Discussion
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[Console] ProgressIndicator console helper display with multiple processes

Fixes incorrect display when ProgressIndicator is used by multiple processes.

| Q             | A
| ------------- | ---
| Branch?       |  6.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Fix #62306
| License       | MIT

When the output is a ConsoleSectionOutput, the overwrite() method was writing raw ANSI escape sequences (\x0D\x1B[2K) directly via write(), which ConsoleSectionOutput's doWrite() recorded as content — corrupting its internal line counter and causing indicators to creep upward on each redraw cycle.

Also, finish() called writeln('') after display() to terminate the line, but ConsoleSectionOutput::overwrite() already ends with writeln(), so the extra call registered a phantom blank line in the section's content.

Fix by delegating to ConsoleSectionOutput::overwrite() when the output is an instance of ConsoleSectionOutput, and skipping the trailing writeln('') in finish() for the same case.

The original issue:
![progress_indicator_KO_override](https://github.com/user-attachments/assets/02918b8a-c0f6-47b3-8a1a-14864ddd71f5)

The blank line issue:
![progress_indicator_KO_blank_line](https://github.com/user-attachments/assets/39b0692c-c82e-401d-a3ae-50b41853ec1d)

The fix:
![progress_indicator_OK](https://github.com/user-attachments/assets/d9d7a44e-7f00-4fbd-8be4-8172546c7944)

Commits
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637d010af39 [Console] ProgressIndicator console helper display with multiple processes

…empty input