[Core] New Config Paradigm

[anmolagarwalcp810]

FIX: Introducing new config paradigm with Python Dataclasses

Earlier, configuration was loaded from yaml files. Now it will be loaded from python dataclasses leading to much cleaner use of configuration.

Changes:

1. Remove yaml files.
2. Introduce data classes in various config files which now contain configurations. Also introduced new enum types for configs like DeviceSKUType and NodeSKUType.
3. Reflected entire codebase to use data classes with new syntax.
4. Bug fixes:
   a. Allowed for default_factory in create_from_cli_args function in flat_dataclass.py file. Earlier error was coming for when creating FlatClass for mutable data types such as list.
5. Added helper description for each configuration field.
6. Added implementation to store configuration of each run.
7. Added method to specify type of any config, like replica scheduler through CLI args.

[anmolagarwalcp810]

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