[TASKKILL] Final sync with wine-10.0 (#7855)

[WINESYNC] taskkill: Build with msvcrt.
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
wine commit id fb80c1b554eaf07bf2f89fcf2960e39bd0d4787a by Alexandre Julliard <julliard@winehq.org>

[WINESYNC] taskkill: Use wide-char string literals.
Signed-off-by: Michael Stefaniuc <mstefani@winehq.org>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
wine commit id 3180972ee2c8e67c425aa7f5279d0cd830455c3d by Michael Stefaniuc <mstefani@winehq.org>

[WINESYNC] taskkill: Use the standard va_list instead of __ms_va_list.
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
wine commit id 2c2e75503bea973a3091ea48d431782da656ef8e by Alexandre Julliard <julliard@winehq.org>

[WINESYNC] taskkill: Use OEM code page for output.
Signed-off-by: Eric Pouech <eric.pouech@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
wine commit id 8fdf397505522cc8e41b58cd960899ef7cdf322b by Eric Pouech <eric.pouech@gmail.com>

[WINESYNC] taskkill: Use exit code 1 when terminating processes.
wine commit id fe6294c74346e9956fb839d2a4ca078c624f6bbf by Brendan Shanks <bshanks@codeweavers.com>

[WINESYNC] taskkill: Use CRT allocation functions.
wine commit id dd3f3f381f9e761325c7c06236de1241c9605ed6 by Paul Gofman <pgofman@codeweavers.com>

[WINESYNC] taskkill: Remove unneeded free() before process exit.
wine commit id 20ab5f06d0972440a7df7fb1ba390ab1b32f3b1d by Paul Gofman <pgofman@codeweavers.com>

[WINESYNC] taskkill: Enumerate processes in main().
wine commit id cf4a0b7392f33ba3e0b3fe69007a6d1f327f13f2 by Paul Gofman <pgofman@codeweavers.com>

[WINESYNC] taskkill: Factor out get_task_pid().
wine commit id 62ef3c5be1d2c5374399984588a9daa75663d030 by Paul Gofman <pgofman@codeweavers.com>

[WINESYNC] taskkill: Use toolhelp snapshot to get process information.
wine commit id 6cca1f5099a8354b67578b42dd34fd010e80b6de by Paul Gofman <pgofman@codeweavers.com>

[WINESYNC] taskkill: Mark processes for termination in main().
wine commit id 5c851451892e05c1747108432a5a2bff3a78ed9e by Paul Gofman <pgofman@codeweavers.com>

[WINESYNC] taskkill: Support terminating child processes.
wine commit id fb6b1c91bbf412f5eba260ae52ee38176fd693d4 by Paul Gofman <pgofman@codeweavers.com>

NOTE: This implementation is disabled for ReactOS, and we keep
our own. See the comment block in the code for the reasons why.

+ Adaptations for ReactOS-specific code.

In particular, great care has been taken to keep the `pkill_list`
functionality (read: fix) introduced in PR #2403 (commit 97e7efc0

).
The current problem with Wine's code is that if many processes (more
than one) with the same image name are running, then:

   taskkill /im theimagename.exe

would only terminate *one* of the corresponding processes, instead of
all processes having this same image name (as on Windows).
The `pkill_list` array contains all the PIDs of these processes. This
replaces the single `pid` initialized by `get_task_pid`.

Co-authored-by: Hermès Bélusca-Maïto <hermes.belusca-maito@reactos.org>