Disabled cases in CreateAbsoluteUri_LocalPaths_Unix

[jaredpar]

In commit 1689311 inside PR #83052 several cases were deleted from the theory CreateAbsoluteUri_LocalPaths_Unix. These were failing on Linux with various errors. Given that the tests hadn't previously ran on Linux the suspicion is these were not correct.

Error messages include:

    Microsoft.CodeAnalysis.LanguageServer.UnitTests.ProtocolConversionsTests.CreateRelativePatternBaseUri_LocalPaths_Unix(filePath: "\\\\\\\\\\‎", expectedRelativeUri: "file:///////%E2%80%8E") (< 
      1ms): Error Message: System.IndexOutOfRangeException : Index was outside the bounds of the array.
      Stack Trace:
         at System.Uri.CreateUriInfo(Flags cF)
         at System.Uri.EnsureUriInfo()
         at System.Uri.ParseRemaining()
         at System.Uri.InitializeUri(ParsingError err, UriKind uriKind, UriFormatException& e)
         at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind, UriCreationOptions& creationOptions)
         at System.Uri..ctor(String uriString, UriKind uriKind)
         at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.CreateAbsoluteUri(String absolutePath) in /home/jaredpar/code/roslyn/src/LanguageServer/Protocol/Extensions/ProtocolConversions.
      cs:line 205
         at Microsoft.CodeAnalysis.LanguageServer.ProtocolConversions.CreateRelativePatternBaseUri(String path) in /home/jaredpar/code/roslyn/src/LanguageServer/Protocol/Extensions/ProtocolConversio
      ns.cs:line 243
         at Microsoft.CodeAnalysis.LanguageServer.UnitTests.ProtocolConversionsTests.CreateRelativePatternBaseUri_LocalPaths_Unix(String filePath, String expectedRelativeUri) in /home/jaredpar/code/
      roslyn/src/LanguageServer/ProtocolUnitTests/ProtocolConversionsTests.cs:line 155
         at InvokeStub_ProtocolConversionsTests.CreateRelativePatternBaseUri_LocalPaths_Unix(Object, Span`1)
         at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• [Uri] Uri(String, UriKind) throws IndexOutOfRangeException for certain inputs runtime#1487