[ES|QL] Fixes warnings with escaped quotes (#213685)

## Summary

Fixes a big where the warning appear wrong when the warning message has
escaped quotes.

**Before**
![image
(84)](https://github.com/user-attachments/assets/db7eaca1-bb04-4785-ae3e-2ecb3da694ee)


**Now**

![image](https://github.com/user-attachments/assets/afc107e1-b83d-4d3b-862c-6c2bffc27656)



### Checklist

- [ ] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios


Brought at my attention from @nik9000 ❤️

---------

Co-authored-by: Dima Arnautov <arnautov.dima@gmail.com>

src/platform/packages/private/kbn-esql-editor/src/helpers.test.ts

@@ -202,6 +202,36 @@ describe('helpers', function () {
         },
       ]);
     });
+
+    it('should return the correct array of warningsif the quotes are escaped (at that case we dont have a new warning)', function () {
+      const warning = `299 Elasticsearch-9.1.0 "No limit defined, adding default limit of [1000]", "Line 1:9: evaluation of [TO_LOWER([\\"FOO\\", \\"BAR\\"])] failed", "Line 1:9: java.lang.IllegalArgumentException: single-value function encountered multi-value"`;
+      expect(parseWarning(warning)).toEqual([
+        {
+          endColumn: 10,
+          endLineNumber: 1,
+          message: 'No limit defined, adding default limit of [1000]',
+          severity: 4,
+          startColumn: 1,
+          startLineNumber: 1,
+        },
+        {
+          endColumn: 40,
+          endLineNumber: 1,
+          message: 'evaluation of [TO_LOWER(["FOO", "BAR"])] failed',
+          severity: 4,
+          startColumn: 9,
+          startLineNumber: 1,
+        },
+        {
+          endColumn: 18,
+          endLineNumber: 1,
+          message: 'single-value function encountered multi-value',
+          severity: 4,
+          startColumn: 9,
+          startLineNumber: 1,
+        },
+      ]);
+    });
   });
 
   describe('getIndicesList', function () {

src/platform/packages/private/kbn-esql-editor/src/helpers.ts

@@ -63,7 +63,10 @@ export const useDebounceWithOptions = (
   );
 };
 
-const quotedWarningMessageRegexp = /"(.*?)"/g;
+// Quotes can be used as separators for multiple warnings unless
+// they are escaped with backslashes. This regexp will match any
+// quoted string that is not escaped.
+const quotedWarningMessageRegexp = /"(?:[^"\\]*(?:\\.[^"\\]*)*)"/g;
 
 export const parseWarning = (warning: string): MonacoMessage[] => {
   if (quotedWarningMessageRegexp.test(warning)) {
@@ -71,7 +74,8 @@ export const parseWarning = (warning: string): MonacoMessage[] => {
     if (matches) {
       return matches.map((message) => {
         // start extracting the quoted message and with few default positioning
-        let warningMessage = message.replace(/"/g, '');
+        // replaces the quotes only if they are not escaped
+        let warningMessage = message.replace(/(?<!\\)"|\\/g, '');
         let startColumn = 1;
         let startLineNumber = 1;
         // initialize the length to 10 in case no error word found