Zope-copypastemove

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- Favor ``zope.principalannotation`` over its ``zope.app`` variant.

- Avoid ``zope.app.component`` and testing dependencies.

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- Fix documentation for the ``IObjectCopier.copyTo`` method.

- Add a missing dependency on ``zope.app.component``.

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- Use the new ``zope.copy`` package for ObjectCopier to provide pluggable
copying mechanism that is not dependent on ``zope.location`` hardly.

- Move the ``ItemNotFoundError`` exception to the interfaces module as
it's part of public API. Old import still works as we actually
use it where it was previously defined, however, the new import
place is preferred.

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- Use ``zope.container`` instead of ``zope.app.container``.

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- Move the test dependencies to a ``test`` extra requirement.

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- No further changes since 3.4.0a1.