Built-in Filters and Endpoints as C++ Nodes

[stepmikhaylov]

Summary

Move the engine's built-in filters and endpoints out of the engine and deliver them as
discrete C++ nodes.

Result

Filters and endpoints become independently deliverable units rather than engine internals.
The engine ships smaller, and a filter can change without changing the engine.

Scope

Entity	Kind	Status
Hash (Fingerprint in the UI)	filter	implemented
Parse	filter	implemented
AWS	endpoint	outstanding
Azure	endpoint	outstanding
MS Outlook	endpoint	outstanding

Proceeds together with #2307, which gains whatever API a given port requires.

Parent

Part of #1577 (C++ Nodes).

[github-actions]

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