fix(release): Ignore unnecessary files

[ChristophWurst]

Tool configuration and e2e tests should not be shipped.

[ChristophWurst]

/backport to stable5.0

[codecov[bot]]

Codecov Report

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

Project coverage is 23.43%. Comparing base (4d46142) to head (30efafe). Report is 4 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #6513 +/- ## ========================================= Coverage 23.43% 23.43% Complexity 453 453 ========================================= Files 247 247 Lines 11724 11724 Branches 2224 2223 -1 ========================================= Hits 2748 2748 Misses 8656 8656 Partials 320 320 ``` | [Flag](https://app.codecov.io/gh/nextcloud/calendar/pull/6513/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nextcloud) | Coverage Δ | | |---|---|---| | [javascript](https://app.codecov.io/gh/nextcloud/calendar/pull/6513/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nextcloud) | `15.03% <ø> (ø)` | | | [php](https://app.codecov.io/gh/nextcloud/calendar/pull/6513/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nextcloud) | `59.29% <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=nextcloud#carryforward-flags-in-the-pull-request-comment) to find out more.

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