Nested datastores - part 2 + disallow aliasing

[andre4i]

Description

ADO:7302

Unifying the creation APIs of the runtime and the channel collection. From a functional perspective, this is moving the logic to actually create/fetch datastores from the runtime to the channel collection. The runtime behavior would remain unchanged, as it delegates responsibility to the channel collection it owns.

This change also adds the concept of a level for datastores and disallows aliasing operations as currently they can lead to undefined (or incompatible) behavior.

Upcoming changes in subsequent PRs

• enable aliasing at levels below the runtime
• IFluidParentContext and IFluidDataStoreContext should eventually converge to the same signature
• (...)

[msfluid-bot]

⯅ @fluid-example/bundle-size-tests: +796 Bytes

Metric Name	Baseline Size	Compare Size	Size Diff
aqueduct.js	514.76 KB	515.15 KB	⯅ +397 Bytes
connectionState.js	680 Bytes	680 Bytes	■ No change
containerRuntime.js	249.2 KB	249.59 KB	⯅ +399 Bytes
loader.js	128.17 KB	128.17 KB	■ No change
map.js	41.35 KB	41.35 KB	■ No change
matrix.js	143.61 KB	143.61 KB	■ No change
odspDriver.js	97.49 KB	97.49 KB	■ No change
odspPrefetchSnapshot.js	41.91 KB	41.91 KB	■ No change
sharedString.js	161.38 KB	161.38 KB	■ No change
sharedTree.js	330 KB	330 KB	■ No change
Total Size	1.81 MB	1.81 MB	⯅ +796 Bytes

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Baseline commit: 7e4c09a449c1c0e4897a9da09c1ab92b572a52f8

Generated by :no_entry_sign: dangerJS against 55c25f0aff07751efa1a203f27e9942363c02629

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