community/php7-pecl-imagick: add imagemagick dependency as no formats supported without it

Fixes #11522
Status Job ID Name Coverage
  Lint
passed #116532
x86_64 docker-alpine
lint

00:00:19

 
  Build
passed #116537
aarch64 ci-build docker-alpine
build-aarch64

00:02:48

passed #116538
armv7 ci-build docker-alpine
build-armv7

00:03:14

passed #116536
ppc64le ci-build docker-alpine
build-ppc64le

00:03:31

passed #116535
s390x ci-build docker-alpine
build-s390x

00:01:33

passed #116534
x86 ci-build docker-alpine
build-x86

00:02:23

passed #116533
x86_64 ci-build docker-alpine
build-x86_64

00:01:38