Inject line processors in ScriptAnalyzer

At the moment, line processors are created within the [ScriptAnalyzer](https://github.com/cake-build/cake/blob/develop/src/Cake.Core/Scripting/Analysis/ScriptAnalyzer.cs). Those should be injected instead. We should also add tests that make sure that the [CoreModule](https://github.com/cake-build/cake/blob/develop/src/Cake.Core/Modules/CoreModule.cs) registers all processors.

This will make it possible to add custom line processors via modules.

Start by reading src/Cake.Core/Scripting/Analysis/ScriptAnalyzer.cs to locate how line processors are created, then inspect src/Cake.Core/Modules/CoreModule.cs. Add coverage confirming CoreModule registers all processors and verify that processors can be supplied through modules; run the relevant test suite to confirm the registrations and analysis still work.

Written by the indexing model from the issue text.