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=2cdffd348b8a4de62b51e1f6c37a7d414004c09e
-sha256=273c37842eedefc3575e34bb14819ab3738a32c39ae634f2342bb50baa740c60
+sha1=3626b3080612482186852b8ce9f2444373bc3da3
+sha256=4203271d92d1a9152a75ac5c0b40f80ecd3d235d108e0711de9d3e33570e2973

build/pkgs/configure/package-version.txt

@@ -1 +1 @@
-9b58ceaa68960b38142f27fdfc04373301da4e46
+e322c219ac0cc4e41bf974a2f7a0c2b019da85d3

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