[7.17] Partially revert yarn upgrade (elastic#175805) (elastic#175806)

# Backport

This will backport the following commits from `main` to `7.17`:
- [Partially revert yarn upgrade
(elastic#175805)](elastic#175805)

<!--- Backport version: 9.4.3 -->

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

<!--BACKPORT
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revert yarn upgrade (elastic#175805)\n\nWe upgraded bazel and the corepack
version to 1.22.21. We're seeing some\r\nissues upgrading the global
version, and there isn't a strict need yet.\r\nThis sets engines.yarn
back to ^1.22.19 to unblock areas having
issues.","sha":"6a78467a09121d48662d7eced97e136919898d78","branchLabelMapping":{"^v8.13.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Operations","release_note:skip","backport:all-open","v8.13.0"],"title":"Partially
revert yarn
upgrade","number":175805,"url":"https://github.com/elastic/kibana/pull/175805","mergeCommit":{"message":"Partially
revert yarn upgrade (elastic#175805)\n\nWe upgraded bazel and the corepack
version to 1.22.21. We're seeing some\r\nissues upgrading the global
version, and there isn't a strict need yet.\r\nThis sets engines.yarn
back to ^1.22.19 to unblock areas having
issues.","sha":"6a78467a09121d48662d7eced97e136919898d78"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v8.13.0","branchLabelMappingKey":"^v8.13.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/175805","number":175805,"mergeCommit":{"message":"Partially
revert yarn upgrade (elastic#175805)\n\nWe upgraded bazel and the corepack
version to 1.22.21. We're seeing some\r\nissues upgrading the global
version, and there isn't a strict need yet.\r\nThis sets engines.yarn
back to ^1.22.19 to unblock areas having
issues.","sha":"6a78467a09121d48662d7eced97e136919898d78"}}]}]
BACKPORT-->

Co-authored-by: Jon <jon@elastic.co>

package.json

@@ -67,7 +67,7 @@
   },
   "engines": {
     "node": "20.10.0",
-    "yarn": "^1.22.21"
+    "yarn": "^1.22.19"
   },
   "resolutions": {
     "**/@types/node": "20.10.6",