Fix false positive in Rule Creation specs

Threat Match Rules introduced an additional query input, causing our
CUSTOM_QUERY_INPUT to be ambiguous.

However, instead of failing due to the ambiguity, the behavior of
cypress seems to be to pass! While I haven't yet tracked down the cause
of these false positives, disambiguating these selectors is the
immediate fix.

x-pack/plugins/security_solution/cypress/screens/create_new_rule.ts

@@ -31,7 +31,11 @@ export const COMBO_BOX_INPUT = '[data-test-subj="comboBoxInput"]';
 
 export const CREATE_AND_ACTIVATE_BTN = '[data-test-subj="create-activate"]';
 
-export const CUSTOM_QUERY_INPUT = '[data-test-subj="queryInput"]';
+export const CUSTOM_QUERY_INPUT =
+  '[data-test-subj="detectionEngineStepDefineRuleQueryBar"] [data-test-subj="queryInput"]';
+
+export const THREAT_MATCH_QUERY_INPUT =
+  '[data-test-subj="detectionEngineStepDefineThreatRuleQueryBar"] [data-test-subj="queryInput"]';
 
 export const DEFINE_CONTINUE_BUTTON = '[data-test-subj="define-continue"]';