[3.11] main/alpine-conf: avoid unwanted syslinux for setup-disk on mounted root

Upstream bug: alpine-conf#10455.
8 jobs for !8553 with 3.11-setup-disk-fix in 1 minute and 49 seconds
detached
Status Job ID Name Coverage
  Lint
passed #129311
x86_64 docker-alpine
lint

00:00:23

 
  Build
passed #129316
aarch64 ci-build docker-alpine
build-aarch64

00:00:33

passed #129317
armv7 ci-build docker-alpine
build-armv7

00:00:56

passed #129315
ppc64le ci-build docker-alpine
build-ppc64le

00:00:56

passed #129314
s390x ci-build docker-alpine
build-s390x

00:00:47

passed #129313
x86 ci-build docker-alpine
build-x86

00:00:26

passed #129325
docker-alpine ci-build x86_64
build-x86_64

00:00:27

passed #129312
x86_64 ci-build docker-alpine
build-x86_64

00:00:30