Trim exported APIs from odsp-driver and odsp-urlresolver, and strengthen url checks

[ChumpChief]

Started looking at this due to URL sanitization warnings. I don't suspect these improvements will be sufficient to make those go away completely, but it does make the checks stronger and more correct.

The regexes had a number of bugs and overlooked cases that are now fixed. Added tests covering some of the cases that are now correctly detected.

Stopped exporting the @internal items that didn't need to be exported. Converted several functions to take URL instead of string for stronger typing and guarantees about part formats (e.g. that "origin" has a valid shape for an origin).

[msfluid-bot]

⯆ @fluid-example/bundle-size-tests: -34 Bytes

Metric Name	Baseline Size	Compare Size	Size Diff
aqueduct.js	452.49 KB	452.49 KB	■ No change
azureClient.js	545.05 KB	545.05 KB	■ No change
connectionState.js	680 Bytes	680 Bytes	■ No change
containerRuntime.js	255.4 KB	255.4 KB	■ No change
fluidFramework.js	344.57 KB	344.57 KB	■ No change
loader.js	129.36 KB	129.36 KB	■ No change
map.js	41.35 KB	41.35 KB	■ No change
matrix.js	143.61 KB	143.61 KB	■ No change
odspClient.js	513.29 KB	513.28 KB	⯆ -15 Bytes
odspDriver.js	97.3 KB	97.29 KB	⯆ -4 Bytes
odspPrefetchSnapshot.js	41.86 KB	41.86 KB	■ No change
sharedString.js	161.38 KB	161.38 KB	■ No change
sharedTree.js	334.67 KB	334.67 KB	■ No change
Total Size	3.14 MB	3.14 MB	⯆ -34 Bytes

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Baseline commit: 23652a0

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