[PATCH] coredump: get rid of _META_MANDATORY_MAX

[PATCH] coredump: get rid of _META_MANDATORY_MAX

No functional change. This change is done in preparation for future changes.
Currently, the list of fields which are received on the command line is a
strict subset of the fields which are always expected to be received on a
socket. But when we add new kernel args in the future, we'll have two
non-overlapping sets and this approach will not work. Get rid of the variable
and enumerate the required fields. This set will never change, so this is
actually more maintainable.

The message with the hint where to add new fields is switched with
_META_ARGV_MAX. The new order is more correct.

(cherry-picked from 49f1f2d4a7612bbed5211a73d11d6a94fbe3bb69)
(cherry-picked from aea6a631bca93e8b04a11aaced694f25f4da155e)
(cherry picked from cf16b6b6b2e0a656531bfd73ad66be3817b155cd)

(cherry picked from commit b46a4f023cd80b24c8f1aa7a95700bc0cb828cdc)
(cherry picked from commit 5855552310ed279180c21cb803408aa2ce36053d)
(cherry picked from commit cc31f2d4146831b9f2fe7bf584468908ff9c4de5)

Origin: upstream, https://github.com/systemd/systemd-stable/commit/2c81e60fe0b8c506a4fe902e45bed6f58f482b39
Forwarded: not-needed
Last-Update: 2025-06-23

Gbp-Pq: Name CVE-2025-4598-3.patch