Merge remote-tracking branch 'origin/2.0' into 2.x

Task: add upgrade notes (#984)

Fix: remove phpunit.xml.dist file (#977)

* Fix: ignore deprecations in test

* Report deprecations as warnings

* Revert Report deprecations as warnings

* Fix: remove phpunit.xml.dist

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Co-authored-by: Marco Perberschlager <marco.perberschlager@pimcore.com>

License Switch to POCL (#973)

* License Switch to POCL

* License Switch to POCL

* Apply php-cs-fixer changes

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Co-authored-by: fashxp <8792145+fashxp@users.noreply.github.com>

Update compatibility-bridge-v10 dependency to v2.0

Fix codeception (#972)

Allow setting Date and DateTime-fields to empty / null even if the fi…

…eldtype is DATETIME (#950)

Fix translation keys filter (#934)

* Fix translation keys filter

* Apply php-cs-fixer changes

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Co-authored-by: fashxp <8792145+fashxp@users.noreply.github.com>

Fix translation keys filter (#934)

* Fix translation keys filter

* Apply php-cs-fixer changes

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Co-authored-by: fashxp <8792145+fashxp@users.noreply.github.com>

[Bug]: Cors headers not set when cache was not enabled (#925)

* Fix: Cors header where set only when cache enabled

* Apply php-cs-fixer changes

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Co-authored-by: mcop1 <mcop1@users.noreply.github.com>