Reduce dependency on getdkan/contracts (part 1)

[paul-m]

Partially fixes #3821

Old interface	New interface
\Contracts\CountableInterface	\Countable
\Contracts\HydratableInterface	\Procrastinator\HydratableInterface
\Contracts\ParserInterface	\CsvParser\Parser\ParserInterface

\Contracts\RetrieverInterface and \Contracts\StorerInterface remain in getdkan/contracts because there is no clear place to move them. They're needed within multiple libraries. Refactor this in a followup.

We also need to keep getdkan/contracts as a dependency in many places because some libraries use Contracts\Mock\Storage\Memory for tests. Refactor this in a followup.

Our changes to Drupal\common\Storage\Query... See the @todo which asks if we should just make a QueryInterface.

Merge Steps

In order to make all these changes, we have to modify the following libraries, maybe in this order.

Each PR is a branch named no-contracts, some of which have interdependencies on each other. These PRs will need to be updated to require the release of each of these dependencies.

• Deprecate some contracts contracts#16 - Deprecates all the interfaces changed above (for now)
• Remove dependency on getdkan/contracts csv-parser#20 - Has no dependencies on getdkan/contracts after PR.
• Reduce dependency on getdkan/contracts procrastinator#23 - Uses StorerInterface and RetrieverInterface. We need to figure out where to put storage-related interfaces in round 2 of this refactor.
• Remove dependency on getdkan/contracts file-fetcher#39 - Uses Contracts\Mock\Storage\Memory for testing. Refactor in round 2.
• Removing getdkan/contracts as much as possible harvest#20 - Uses Contracts\Mock\Storage\Memory for testing. Refactor in round 2.

[dafeder]

Dependencies merged and released