meson: use the custom meson provided intl dependency

Let meson deal with the system differences instead of handling
it manually.

The custom dependency was added in meson 0.59, then gained
static support with 0.60, and static support for cygwin with 0.61,
which is why the meson requirement is bumped to 0.61.

Debian bullseye ships meson 0.56, so switch to bookworm which
has 1.0.1

.gitlab-ci.yml

@@ -88,7 +88,7 @@ arch-no-nls:
     - fakechroot meson test -C build
 
 debian:
-  image: debian:bullseye
+  image: debian:bookworm
   before_script:
     - apt update
     - >

meson.build

@@ -8,7 +8,7 @@ project('pacman',
           'sysconfdir=/etc',
           'localstatedir=/var',
         ],
-        meson_version : '>= 0.56')
+        meson_version : '>= 0.61')
 
 libalpm_version = '14.0.0'
 
@@ -79,12 +79,7 @@ conf.set_quoted('ROOTDIR', ROOTDIR)
 
 libintl = dependency('', required: false)
 if get_option('i18n')
-  if not cc.has_function('ngettext')
-    libintl = cc.find_library('intl', required : false, static: get_option('buildstatic'))
-    if not libintl.found()
-      error('ngettext not found but NLS support requested')
-    endif
-  endif
+  libintl = dependency('intl', static: get_option('buildstatic'))
   conf.set('ENABLE_NLS', 1)
 endif