add test-utils feature to polkadot-node-core-pvf (#2989)

* add test-utils feature to polkadot-node-core-pvf

* Update Cargo.lock

* Fix Cargo.lock

* Revert Cargo.lock updates

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Update Substrate and Polkadot

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

* Update lockfile

Signed-off-by: Oliver Tale-Yazdi <[email protected]>

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Signed-off-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: Marcin S <[email protected]>
Co-authored-by: Oliver Tale-Yazdi <[email protected]>