Fix perl path in scripts

Fix Lintian issue https://lintian.debian.org/tags/incorrect-path-for-interpreter.html

Upstream will never accept this patch,
see https://github.com/MariaDB/server/pull/1718

Origin: https://patch-diff.githubusercontent.com/raw/MariaDB/server/pull/1718.patch
Forwarded: https://github.com/MariaDB/server/pull/1718 (rejected, will never be merged)

Gbp-Pq: Name env-perl-usr-bin-perl.patch

mariadb (1:11.8.6-2+rpi1) forky-staging; urgency=medium

  * Disable testsuite.

[dgit import unpatched mariadb 1:11.8.6-2+rpi1]

Import mariadb_11.8.6-2+rpi1.debian.tar.xz

[dgit import tarball mariadb 1:11.8.6-2+rpi1 mariadb_11.8.6-2+rpi1.debian.tar.xz]

Import mariadb_11.8.6.orig.tar.gz

[dgit import orig mariadb_11.8.6.orig.tar.gz]