Build a rapid Generator for SDKV2 Schema/Value pairs

[t0yv0]

To facilitate testing across the space of possible SDKv2 schemas, build a generator that creates tuples (s, v) of a schema s and a TF value that conforms to the schema v: s.

There are some important variations to cover

• every possible combination of schema, up to depth 3, including maps, sets and objects
• within the schema, every possible combination of Attribute, Block, and nesting modes (SingleNested, ListNested, etc)
• every possible combination of attribute kind, Computed, Optional, Computed+Optional, Required
• sets, including several distinct custom set hashes
• objects need to have up to 2 attributes so Set[Obj] combination cover variations of attribute kind
• when generating values, ensure to cover null, unknown, and empty values and 2 regular values, say for strings [null, unknown, "", "a", "b" ]