Yet more unsupported locales for Kerb tests (elastic#112555) (elastic#116525)

Adds more locales, in addition to
elastic#109670 (see the original
PR for context).

Closes: elastic#112533 Closes:
elastic#112534
(cherry picked from commit a2df7e7)

Co-authored-by: Nikolaj Volgushev <[email protected]>

Author: gwbrown

x-pack/qa/evil-tests/src/test/java/org/elasticsearch/xpack/security/authc/kerberos/KerberosTestCase.java

@@ -86,7 +86,8 @@ public abstract class KerberosTestCase extends ESTestCase {
         "sd",
         "mni",
         "sat",
-        "sa"
+        "sa",
+        "bgc"
     );
 
     @BeforeClass