Fix ProfileIntegTests (elastic#117888)

The test setup for `ProfileIntegTests` is flawed, where the full name of
a user can be a substring of other profile names (e.g., `SER` is a
substring of `User <random-string>-space1`) -- when that's passed into
suggest call with the `*` space, we get a match on all profiles, instead
of only the one profile expected in the test, since we are matching on
e.g. `SER*`. This PR restricts the setup to avoid the wildcard profile
for that particular test.

Closes: elastic#117782

x-pack/plugin/security/src/internalClusterTest/java/org/elasticsearch/xpack/security/profile/ProfileIntegTests.java

@@ -557,8 +557,11 @@ public void testSuggestProfilesWithHint() throws IOException {
             equalTo(profileHits4.subList(2, profileHits4.size()))
         );
 
+        // Exclude profile for "*" space since that can match _all_ profiles, if the full name is a substring of "user" or the name of
+        // another profile
+        final List<Profile> nonWildcardProfiles = profiles.stream().filter(p -> false == p.user().fullName().endsWith("*")).toList();
         // A record will not be included if name does not match even when it has matching hint
-        final Profile hintedProfile5 = randomFrom(profiles);
+        final Profile hintedProfile5 = randomFrom(nonWildcardProfiles);
         final List<Profile> profileHits5 = Arrays.stream(
             doSuggest(
                 Set.of(),