sagemathgh-38663: Freetype fails to find freetype on macos

Freetype fails to find freetype on macos (Mac mini M2 with only XCode
installed):

    src/checkdep_freetype2.c:8:10: fatal error: 'ft2build.h' file not
found
    #include <ft2build.h>
             ^~~~~~~~~~~~
    2 errors generated.
    error: command '/usr/bin/gcc' failed with exit code 1

Sage skips installing zlib on macos because it is installed as part of
XCode. The freetype configuration uses freetype-config which ends up
using pkg-config to find zlib. In their infinite wisdom, Apple does not
ship the .pc file:

    vbraun@Mini-M2 local % ./bin/freetype-config
    Package zlib was not found in the pkg-config search path.
    Perhaps you should add the directory containing `zlib.pc'
    to the PKG_CONFIG_PATH environment variable
    Package 'zlib', required by 'libpng', not found
    Package zlib was not found in the pkg-config search path.
    Perhaps you should add the directory containing `zlib.pc'
    to the PKG_CONFIG_PATH environment variable
    Package 'zlib', required by 'libpng', not found

Solution is to require a zlib.pc file via PKG_CHECK_MODULES([zlib], ...

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URL: sagemath#38663
Reported by: Volker Braun
Reviewer(s):

build/pkgs/configure/checksums.ini

@@ -1,3 +1,3 @@
 tarball=configure-VERSION.tar.gz
-sha1=3df2b29a0be22e74bc2f58297e8848d44d62a1ed
-sha256=0e6edf9ba6dcd3c318ef0554940428370fb686403339cbc105cad0aa9296d7e3
+sha1=6aaa0cb425b722635ce3ab767a088d3429ec5598
+sha256=c330971ae08ebec45299e5846e67a3651b78f0e3e543b5aa6029cf2f580de5d8

build/pkgs/configure/package-version.txt

@@ -1 +1 @@
-63276c5d5afef5f2965464612d0bf399a14b041d
+d1affff8201e05f2b346b1b051571a2199a45281

build/pkgs/zlib/spkg-configure.m4

@@ -1,7 +1,8 @@
 SAGE_SPKG_CONFIGURE([zlib], [
+    PKG_CHECK_MODULES([zlib], [zlib >= 1.2.11], [zlib_cv_pc=yes], [zlib_cv_pc=no])
     AC_CHECK_LIB([z], [inflateEnd], [zlib_cv_libz=yes], [zlib_cv_libz=no])
     AC_CHECK_HEADER([zlib.h], [zlib_cv_zlib_h=yes], [zlib_cv_zlib_h=no])
-    if test "$zlib_cv_libz" = "yes" && test "$zlib_cv_zlib_h" = "yes"; then
+    if test "$zlib_cv_pc" = "yes" && test "$zlib_cv_libz" = "yes" && test "$zlib_cv_zlib_h" = "yes"; then
         PKG_CHECK_MODULES([LIBPNG], [libpng >= 1.2], [], [
             dnl inflateValidate is needed for Sage's libpng, newer than 1.2; this ensures
             dnl we have the minimum required for building zlib version