Add initial csv test

Author: svilen-mihaylov-elastic

x-pack/plugin/esql/qa/testFixtures/src/main/resources/multi-match-function.csv-spec

@@ -0,0 +1,84 @@
+###############################################
+# Tests for MultiMatch function
+#
+
+multiMatchWithField
+required_capability: multi_match_function
+
+// tag::multi-match-with-field[]
+FROM books
+| WHERE MULTI_MATCH("Faulkner", "author", "summary", {"fuzziness": 1})
+| KEEP book_no, author
+| SORT book_no
+| LIMIT 5
+// end::multi-match-with-field[]
+;
+
+// tag::multi-match-with-field-result[]
+book_no:keyword | author:text
+2378            | [Carol Faulkner, Holly Byers Ochoa, Lucretia Mott]
+2713            | William Faulkner
+2847            | Colleen Faulkner
+2883            | William Faulkner
+3293            | Danny Faulkner
+// end::multi-match-with-field-result[]
+;
+
+testMultiMatchWithOptionsFuzziness
+required_capability: multi_match_function
+
+from books 
+| where multi_match("Pings", "title", "summary", {"fuzziness": 1})  
+| keep book_no;
+ignoreOrder:true
+
+book_no:keyword
+2714
+2675
+4023
+7140
+;
+
+testMultiMatchWithOptionsOperator
+required_capability: multi_match_function
+
+// tag::multi-match-with-named-function-params[]
+FROM books
+| WHERE MULTI_MATCH("Hobbit Back Again", "title", "summary", {"operator": "AND"})
+| KEEP title;
+// end::multi-match-with-named-function-params[]
+
+// tag::multi-match-with-named-function-params-result[]
+title:text
+The Hobbit or There and Back Again
+// end::multi-match-with-named-function-params-result[]
+;
+
+testMultiMatchWithOptionsMinimumShouldMatch
+required_capability: multi_match_function
+
+from books 
+| where multi_match("Hobbit Back Again", "title", "summary", {"minimum_should_match": 2})
+| keep title;
+
+title:text
+The Hobbit or There and Back Again
+;
+
+testMultiMatchWithNonPushableDisjunctions
+required_capability: multi_match_function
+required_capability: full_text_functions_disjunctions_compute_engine
+
+from books 
+| where multi_match("lord", "title", "summary", {}) or length(title) > 130 
+| keep book_no
+;
+ignoreOrder: true
+
+book_no:keyword
+2675   
+2714   
+4023   
+7140   
+8678
+;