chore: use vaadin-parent 2.2.1 as parent for hilla-bom

[ZheSun88]

using hilla-project brings the <dependencyManangement> from parent, which is not the one want

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.00%. Comparing base (c03215c) to head (2bb6130).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2541 +/- ## ======================================= Coverage 95.00% 95.00% ======================================= Files 66 66 Lines 4546 4546 Branches 661 661 ======================================= Hits 4319 4319 Misses 182 182 Partials 45 45 ``` | [Flag](https://app.codecov.io/gh/vaadin/hilla/pull/2541/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vaadin) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/vaadin/hilla/pull/2541/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vaadin) | `95.00% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=vaadin#carryforward-flags-in-the-pull-request-comment) to find out more.

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[ZheSun88]

same fix has been added to 24.4 branch via #2542