[8.14] [ML] Removing use of re2 library (#186104) (#188371)

# Backport

This will backport the following commits from `main` to `8.14`:
- [[ML] Removing use of re2 library
(#186104)](#186104)

<!--- Backport version: 8.9.8 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"James
Gowdy","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-06-13T05:43:40Z","message":"[ML]
Removing use of re2 library (#186104)\n\nWe no longer need to use `re2`
over the standard regex
library.","sha":"ed70d4c6ffb77324f9c6e74e26ed559303ae6c3f","branchLabelMapping":{"^v8.15.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:fix",":ml","backport:skip","v8.15.0"],"number":186104,"url":"https://github.com/elastic/kibana/pull/186104","mergeCommit":{"message":"[ML]
Removing use of re2 library (#186104)\n\nWe no longer need to use `re2`
over the standard regex
library.","sha":"ed70d4c6ffb77324f9c6e74e26ed559303ae6c3f"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v8.15.0","labelRegex":"^v8.15.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/186104","number":186104,"mergeCommit":{"message":"[ML]
Removing use of re2 library (#186104)\n\nWe no longer need to use `re2`
over the standard regex
library.","sha":"ed70d4c6ffb77324f9c6e74e26ed559303ae6c3f"}}]}]
BACKPORT-->

Co-authored-by: James Gowdy <[email protected]>

x-pack/plugins/ml/server/saved_objects/initialization/space_overrides/logs.ts

@@ -6,7 +6,6 @@
  */
 
 import type { IScopedClusterClient } from '@kbn/core/server';
-import RE2 from 're2';
 import { mlLog } from '../../../lib/log';
 
 const GROUP = 'logs-ui';
@@ -42,7 +41,7 @@ export async function logJobsSpaces({
 }
 
 function findLogJobSpaceFactory() {
-  const reg = new RE2(`${MODULE_PREFIX}-(.+)-(${SOURCES.join('|')})-(${JOB_IDS.join('|')})`);
+  const reg = new RegExp(`${MODULE_PREFIX}-(.+)-(${SOURCES.join('|')})-(${JOB_IDS.join('|')})`);
 
   return (jobId: string) => {
     const result = reg.exec(jobId);

x-pack/plugins/ml/server/saved_objects/initialization/space_overrides/metrics.ts

@@ -6,7 +6,6 @@
  */
 
 import type { IScopedClusterClient } from '@kbn/core/server';
-import RE2 from 're2';
 import { mlLog } from '../../../lib/log';
 
 const GROUP = 'metrics';
@@ -49,7 +48,7 @@ export async function metricsJobsSpaces({
 }
 
 function findMetricsJobSpaceFactory() {
-  const reg = new RE2(`${MODULE_PREFIX}-(.+)-(${SOURCES.join('|')})-(${JOB_IDS.join('|')})`);
+  const reg = new RegExp(`${MODULE_PREFIX}-(.+)-(${SOURCES.join('|')})-(${JOB_IDS.join('|')})`);
 
   return (jobId: string) => {
     const result = reg.exec(jobId);

x-pack/plugins/ml/server/saved_objects/service.ts

@@ -5,7 +5,6 @@
  * 2.0.
  */
 
-import RE2 from 're2';
 import { memoize } from 'lodash';
 import type {
   KibanaRequest,
@@ -329,7 +328,7 @@ export function mlSavedObjectServiceFactory(
       if (id.match('\\*') === null) {
         return jobIds.includes(id);
       }
-      const regex = new RE2(id.replace('*', '.*'));
+      const regex = new RegExp(id.replace('*', '.*'));
       return jobIds.some((jId) => typeof jId === 'string' && regex.exec(jId));
     });
   }
@@ -641,7 +640,7 @@ export function mlSavedObjectServiceFactory(
       if (id.match('\\*') === null) {
         return modelIds.includes(id);
       }
-      const regex = new RE2(id.replace('*', '.*'));
+      const regex = new RegExp(id.replace('*', '.*'));
       return modelIds.some((jId) => typeof jId === 'string' && regex.exec(jId));
     });
   }