feat(HierarchyKeyring; CMC): Shared cache across Hierarchy Keyrings

[RitvikKapila]

Issue #, if available:

Description of changes:
Duvet is expected to fail.

Adding a new type Shared to the union CacheType in order to allow a shared cache across multiple hierarchy keyrings. The customer will provide an already initialized CryptographicMaterialsCache as an Shared type, which can be shared across multiple Hierarchical Keyrings.

As before, if any other type in CacheType is provided to the Hierarchical Keyring, it will initialize a cache of that type, to be used with only that Hierarchical Keyring. If nothing is provided here, a DefaultCache is initialized to be used with only that Hierarchical Keyring with entryCapacity = 1000.")

If the method CreateCryptographicMaterialsCache is called with this Shared ICryptographicMaterialsCache type as input, it MUST throw an error since the initialized ICryptographicMaterialsCache should already be one of the other types in the union CacheType, that is one out of DefaultCache, NoCache, SingleThreadedCache, MultiThreadedCache, StormTrackingCache.

Note that it doesn't make sense to create a shared Shared cache of type NoCache because NoCache type caches have entry capacity of 0.

Squash/merge commit message, if applicable:

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