fix(homebrew): give correct error message when become true used (#8048)

* fix(homebrew): give correct error message when become true used

This commit fixes #8047 by raising the exception coming from calling
homebrew with the `become: true` parameter set.

* chore(changelog): add changelog fragment

changelogs/fragments/8048-fix-homebrew-module-error-reporting-on-become-true.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+  - homebrew - error returned from brew command was ignored and tried to parse empty JSON. Fix now checks for an error and raises it to give accurate error message to users (https://github.com/ansible-collections/community.general/issues/8047).

plugins/modules/homebrew.py

@@ -488,6 +488,10 @@ class Homebrew(object):
             self.current_package,
         ]
         rc, out, err = self.module.run_command(cmd)
+        if err:
+            self.failed = True
+            self.message = err.strip()
+            raise HomebrewException(self.message)
         data = json.loads(out)
 
         return _check_package_in_json(data, "formulae") or _check_package_in_json(data, "casks")