Efesto (Separate compilation phase from runtime phase inside drools)

Issue Description:

• Spiit the Assembler(s) so to have a compilation code path and a runtime code path; this change involve also other part of code (knowledgebuilder, packages, kiebase, etc)
• Brainstorming board: https://miro.com/app/board/uXjVO7-T2EE=/
• Architectural documentation: https://docs.google.com/document/d/1n9rKcMh0qnP7R4DUb3xqanFZcN0q7SL8aBRoAdQDSH0
• Action Plan: https://miro.com/app/board/uXjVOz9DQJg=/

Acceptance Criteria:

• replace Assembler(s) with two clearly separated classes, one specific for compilation and the other for runtime
• clearly separate codepaths that leads to one or the other
• implement "Managers" (compiler and runtime) to hide API/implementations and deal with corner- cases where a "compilation" is actually needed during runtime (e.g. pmml)
• clearly separate objects that are specifically used in one code path or the other (e.g. packages)

Out of scope

• unify all models to the usage of refactored Assembler (i.e. drl, etc)