common-lisp: update ubuntu 24.04. Fix key hashing bug.

Newer versions of sbcl now have the same sxhash issue on compound types
as the other common lisp implementations. So always dereference the
underlying base type when generating a hash. This fixes the bug in newer
sbcl that was resulting in `get` and `contains?` not working for
hash-maps.

impls/common-lisp/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM ubuntu:24.04
 MAINTAINER Joel Martin <github@martintribe.org>
 
 ##########################################################

impls/common-lisp/src/types.lisp

@@ -182,11 +182,9 @@
 
 (defun make-mal-value-hash-table ()
   (unless (gethash 'mal-data-value-hash genhash::*hash-test-designator-map*)
-    ;; ECL, ABCL and MKCL's implementations of sxhash do not work well with
-    ;; compound types, use a custom hash function which hashes the underlying
-    ;; value instead
-    (let ((hash-function #+(or ecl abcl mkcl) #'mal-sxhash
-                         #-(or ecl abcl mkcl) #'sxhash))
+    ;; sxhash does not work well with compound types, use a custom
+    ;; hash function which hashes the underlying value instead
+    (let ((hash-function #'mal-sxhash))
       (register-test-designator 'mal-data-value-hash
                                 hash-function
                                 #'mal-data-value=)))