Update dependency @elastic/synthetics to ^1.19.0 (main) (#228818)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [@elastic/synthetics](https://redirect.github.com/elastic/synthetics)
| devDependencies | minor | [`^1.18.2` ->
`^1.19.0`](https://renovatebot.com/diffs/npm/@elastic%2fsynthetics/1.18.2/1.19.0)
|

---

### Release Notes

<details>
<summary>elastic/synthetics (@&#8203;elastic/synthetics)</summary>

###
[`v1.19.0`](https://redirect.github.com/elastic/synthetics/releases/tag/v1.19.0)

[Compare
Source](https://redirect.github.com/elastic/synthetics/compare/v1.18.3...v1.19.0)

##### Features

- support multi space monitors !!
([#&#8203;1052](https://redirect.github.com/elastic/synthetics/issues/1052))
([9f7f6fc](https://redirect.github.com/elastic/synthetics/commit/9f7f6fc8daf4ebcfa30fbc0b4e4e0cb95b8e9cd9))

###
[`v1.18.3`](https://redirect.github.com/elastic/synthetics/releases/tag/v1.18.3)

[Compare
Source](https://redirect.github.com/elastic/synthetics/compare/v1.18.2...v1.18.3)

##### Bug Fixes

- **deps:** upgrade stack-utils type
([#&#8203;1046](https://redirect.github.com/elastic/synthetics/issues/1046))
([26fa3a4](https://redirect.github.com/elastic/synthetics/commit/26fa3a4942b6a5abba2d5939988b3daf79038298))

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xMDcuMCIsInVwZGF0ZWRJblZlciI6IjM5LjEwNy4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJUZWFtOm9icy11eC1tYW5hZ2VtZW50IiwiYmFja3BvcnQ6YWxsLW9wZW4iLCJjaTphbGwtY3lwcmVzcy1zdWl0ZXMiLCJyZWxlYXNlX25vdGU6c2tpcCJdfQ==-->

---------

Co-authored-by: elastic-renovate-prod[bot] <174716857+elastic-renovate-prod[bot]@users.noreply.github.com>
Co-authored-by: kibanamachine <[email protected]>

Author: elastic-renovate-prod[bot]

package.json

@@ -1442,7 +1442,7 @@
     "@cypress/webpack-preprocessor": "^6.0.2",
     "@elastic/eslint-plugin-eui": "2.3.0",
     "@elastic/makelogs": "^6.1.1",
-    "@elastic/synthetics": "^1.18.2",
+    "@elastic/synthetics": "^1.19.0",
     "@emotion/babel-preset-css-prop": "^11.11.0",
     "@emotion/jest": "^11.11.0",
     "@fast-check/jest": "^2.1.1",