pkgs: refactor needless quoting of homepage meta attribute (#27809)

* pkgs: refactor needless quoting of homepage meta attribute

A lot of packages are needlessly quoting the homepage meta attribute
(about 1400, 22%), this commit refactors all of those instances.

* pkgs: Fixing some links that were wrongfully unquoted in the previous
commit

* Fixed some instances

pkgs/tools/security/vulnix/requirements.nix

@@ -22,7 +22,6 @@ rec {
     ]);
 
     meta = with stdenv.lib; {
-      homepage = "";
       license = licenses.zpt21;
       description = "Zope Object Database: object database and persistence";
     };
@@ -41,7 +40,6 @@ rec {
       mock
     ];
     meta = with stdenv.lib; {
-      homepage = "";
       license = licenses.zpt21;
       description = "Transaction management for Python";
     };