Fix packages on Heroku-24

Fixes this error:

```
chrome: error while loading shared libraries: libasound.so.2: cannot open shared object file: No such file or directory
```

And also cleans up the packages list, removing some packages that
either are no longer needed, or already exist in the base image. This
is safe to do now that `bin/test.sh` checks for missing shared libraries.

bin/install-chrome-dependencies

@@ -14,10 +14,10 @@
 topic "Installing Chrome dependencies"
 
 # Install correct dependencies according to $STACK
+# The package list is validated by bin/test.sh - see its output to identify any missing libraries.
+# Also look here for more packages/notes https://developers.google.com/web/tools/puppeteer/troubleshooting
 case "${STACK}" in
-  "heroku-20" | "heroku-22" )
-    # the package list is found by using ci:debug then running ldd $GOOGLE_CHROME_BIN | grep not
-    # also look here for more packages/notes https://developers.google.com/web/tools/puppeteer/troubleshooting
+  "heroku-20" | "heroku-22")
     PACKAGES="
       gconf-service
       libappindicator1
@@ -47,31 +47,19 @@ case "${STACK}" in
     "
     ;;
   "heroku-24")
-    # the package list is found by using ci:debug then running ldd $GOOGLE_CHROME_BIN | grep not
-    # also look here for more packages/notes https://developers.google.com/web/tools/puppeteer/troubleshooting
-    PACKAGES="
-      libatk1.0-0
+    PACKAGES=(
+      fonts-liberation
+      libasound2t64
       libatk-bridge2.0-0
-      libcairo-gobject2
-      libdrm2
+      libatk1.0-0
+      libcups2
       libgbm1
-      libgtk-3-0
-      libnspr4
-      libnss3
-      libx11-xcb1
-      libxcb-dri3-0
       libxcomposite1
-      libxcursor1
       libxdamage1
       libxfixes3
-      libxi6
-      libxinerama1
+      libxkbcommon0
       libxrandr2
-      libxshmfence1
-      libxss1
-      libxtst6
-      fonts-liberation
-    "
+    )
     ;;
   *)
     error "STACK must be 'heroku-20', 'heroku-22' or 'heroku-24', not '${STACK}'."