[ES|QL] RERANK command default inferenceId (elastic#128685)

* [ES|QL] Make inferenceId optional for the `RERANK` command (default to `.rerank-v1-elasticsearch`)

* lint

* Remove old test.

* Fix failing test

Author: afoucret

x-pack/plugin/esql/src/main/antlr/EsqlBaseParser.g4

@@ -304,7 +304,7 @@ rrfCommand
    ;
 
 rerankCommand
-    : DEV_RERANK queryText=constant ON rerankFields WITH inferenceId=identifierOrParameter
+    : DEV_RERANK queryText=constant ON rerankFields (WITH inferenceId=identifierOrParameter)?
     ;
 
 completionCommand