Пакет librpmbuild: Информация

- Merge from 4.0.4.186-alt1 excluding enabling and processing LTO.
- systemd-services.req.in: fixed autoreq for systemd units.
- Backport packaging '%pretrans' Lua scriptlets (ALT#36628).
- build: fixed double timezone adjustment of CHANGELOGTIME tag value.
- scripts: replaced "egrep" with "grep -E", "fgrep" with "grep -F".
- platform.in: added %pre_service_stop_posttrans_start and
  %post_service_posttrans_restart.
- README.ALT-ru_RU.UTF-8: updated.
- Use file4 instead of file.

- debuginfo: Fix building of kernel modules by keeping .BTF section for kernel
  objects.
- brp-debuginfo, process-debuginfo: added support of zstd-compressed modules.
- brp-sign-kmodules:
  + added support of zstd-compressed modules;
  + changed to skip and warn about modules compressed with unsupported method.

- rpm-build: do not record directory sizes in packages.