Add gettext as a dependency of bison (#35979)

The 'bison' executable requires libtextstyle to run.  I think this was
usually satisfied because gettext is often installed with the OS, or
brought in accidentally via perl/m4.

Looks like the libtextstyle library dependency started in Bison 3.4

var/spack/repos/builtin/packages/bison/package.py

@@ -53,6 +53,7 @@ class Bison(AutotoolsPackage, GNUMirrorPackage):
 
     provides("yacc")
 
+    depends_on("gettext", when="@3.4:")
     depends_on("diffutils", type="build")
     depends_on("m4", type=("build", "run"))
     depends_on("perl", type="build")