Effector modules management

[mikevoronov]

Fluence service is a group of modules of three different types:

• facade modules expose the API of an entire service that is callable from Aqua scripts
• pure modules contain pure logic, and they can't access the filesystem or call external binaries
• effector modules can access filesystem through WASI and call external binaries

The difference between pure and effector was made to allow node hosters to distinguish between (possibly harmful) effector and (harmless) pure modules. But at the moment in Marine there is no any difference between pure and effector types of modules.