Codebase: For upgradeable contracts ensure upgradability of each contract in inheritance tree

[rapidddenis]

E.g. Component is upgradeable, while its parent RegistryLinked is not

[doerfli]

please provide the list of impacted contracts

[matthiaszimmermann]

RegistryLinked is so limited in scope it felt like overkill to implement it via contract specific struct storage

[rapidddenis]

There is a storage conflict:
UpgradableProxyWithAdmin is not stateless -> keeps initializationData at slot 0
RegistryLinked is part of UpgradableProxyWithAdmin implementation and keeps registry at slot 0

So either proxy is stateless OR implementation is using namespace storage OR proxy state is also utilizes namespace storage

[rapidddenis]

#649