Support for quoted strings and ?params (#137502)

Author: felixbarny

x-pack/plugin/esql/src/main/antlr/PromqlBaseLexer.tokens

@@ -23,6 +23,7 @@ PROMQL_UNQUOTED_IDENTIFIER
 PROMQL_QUOTED_IDENTIFIER: QUOTED_IDENTIFIER -> type(QUOTED_IDENTIFIER);
 PROMQL_NAMED_PARAMS: NAMED_OR_POSITIONAL_PARAM -> type(NAMED_OR_POSITIONAL_PARAM);
 
+PROMQL_QUOTED_STRING: QUOTED_STRING -> type(QUOTED_STRING);
 
 // Exit back to default mode on pipe
 PROMQL_PARAMS_PIPE : PIPE -> type(PIPE), popMode;

x-pack/plugin/esql/src/main/antlr/PromqlBaseParser.tokens

@@ -17,6 +17,8 @@ promqlParam
 promqlParamContent
     : PROMQL_UNQUOTED_IDENTIFIER
     | QUOTED_IDENTIFIER
+    | QUOTED_STRING
+    | NAMED_OR_POSITIONAL_PARAM
     ;
 
 promqlQueryPart