[2.0-stable] Cherry-pick: Fix errors from missing resource dll with version info (#6725)

[Manodasan Wignarajah (manodasanW)]

Cherry-picks #6725 to release/2.0-stable.

The runtime package is what contains Microsoft.WindowsAppRuntime.Insights.Resource.dll as that is where we can say this runtime framework package is this version. But when someone uses individual component packages without the runtime package, that currently leads to errors due to the DLL is not there. Instead of erroring, we should safely handle these situations based on what info we can provide.

• For Version info, we just return 0 or empty now when the dll is missing as we can't say what version it is given each component package can be a different version and there is no framework package involved.
• For the IsSelfContained check that seems to also call this, that now returns true to indicate it is self-contained when this DLL isn't there.

The new behavior is guarded by runtime compatibility change VersionInfo_MissingResourceDllFallback (64191138). Disabling the change preserves the previous behavior.

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