[Test] Add test for composites with symbol groups

test/functional/cases/109_composites.robot

 *** Test Cases ***
 Composites - Score
   ${result} =  Scan Message With Rspamc  ${MESSAGE}
-  Check Rspamc  ${result}  ${SPACE}46.00 / 0.00
+  Check Rspamc  ${result}  ${SPACE}50.00 / 0.00
 
 Composites - Expressions
   ${result} =  Scan Message With Rspamc  ${MESSAGE}
   Check Rspamc  ${result}  DEFAULT_POLICY_LEAVE (5.00)
   Should Contain  ${result.stdout}  DEFAULT_POLICY_LEAVE_A (1.00)
   Should Contain  ${result.stdout}  DEFAULT_POLICY_LEAVE_B (1.00)
+
+Composites - Symbol groups
+  ${result} =  Scan Message With Rspamc  ${MESSAGE}
+  Check Rspamc  ${result}  SYMBOL_GROUPS (5.00)
+  Should Contain  ${result.stdout}  POSITIVE_A (-1.00)
+  Should Contain  ${result.stdout}  ANY_A (-1.00)
+  Should Contain  ${result.stdout}  NEGATIVE_B (1.00)
+  Should Not Contain  ${result.stdout}  NEGATIVE_A

test/functional/configs/composites.conf

         score = 5.0;
         policy = "leave";
     }
+
+    SYMBOL_GROUPS {
+        expression = "!g+:positive & g-:negative & -g:any";
+        score = 5.0;
+    }
 }

test/functional/lua/composites.lua

     return true, 'Fires always'
   end
 })
+
+rspamd_config:register_symbol({
+  name = 'POSITIVE_A',
+  score = -1.0,
+  group = "positive",
+  callback = function()
+    return true, 'Fires always'
+  end
+})
+rspamd_config:register_symbol({
+  name = 'NEGATIVE_A',
+  score = -1.0,
+  group = "negative",
+  callback = function()
+    return true, 'Fires always'
+  end
+})
+rspamd_config:register_symbol({
+  name = 'NEGATIVE_B',
+  score = 1.0,
+  group = "negative",
+  callback = function()
+    return true, 'Fires always'
+  end
+})
+rspamd_config:register_symbol({
+  name = 'ANY_A',
+  score = -1.0,
+  group = "any",
+  callback = function()
+    return true, 'Fires always'
+  end
+})