Fixing connected document parsing in binding queue.

[aasimkhan30]

Description

Previously any stack overflow error while parsing a connected script lead to crashing of sts.
This fixes that by making it run on a thread with larger stack size just like offline parsing scenarios.

Example error:

t Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlScalarExpressionError.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlCodeObject.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlCodeObject.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlCodeObject.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlQuerySpecification.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlCodeObject.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlCodeObject.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlStatement.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlSelectStatement.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlCodeObject.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlBatch.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlCodeObject.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlScript.Unbind()
   at Microsoft.SqlServer.Management.SqlParser.Parser.Internals.VersionedParserBase.Parse(Boolean, System.String, Microsoft.SqlServer.Management.SqlParser.SqlCodeDom.SqlScript, Microsoft.SqlServer.Management.SqlParser.Parser.ParseOptions, Microsoft.SqlServer.Management.SqlParser.Parser.ParseOptions ByRef)
   at Microsoft.SqlServer.Management.SqlParser.Parser.Parser.Parse(Boolean, System.String, Microsoft.SqlServer.Management.SqlParser.Parser.ParseResult, Microsoft.SqlServer.Management.SqlParser.Parser.ParseOptions, Microsoft.SqlServer.Management.SqlParser.Parser.ParseOptions ByRef)
   at Microsoft.SqlServer.Management.SqlParser.Parser.Parser.IncrementalParse(System.String, Microsoft.SqlServer.Management.SqlParser.Parser.ParseResult, Microsoft.SqlServer.Management.SqlParser.Parser.ParseOptions, Microsoft.SqlServer.Management.SqlParser.Parser.ParseOptions ByRef)
   at Microsoft.SqlServer.Management.SqlParser.Parser.Parser.IncrementalParse(System.String, Microsoft.SqlServer.Management.SqlParser.Parser.ParseResult, Microsoft.SqlServer.Management.SqlParser.Parser.ParseOptions)
   at Microsoft.SqlTools.ServiceLayer.LanguageServices.LanguageService+<>c__DisplayClass72_0.<ParseAndBind>b__2(Microsoft.SqlTools.ServiceLayer.LanguageServices.IBindingContext, System.Threading.CancellationToken)
   at Microsoft.SqlTools.ServiceLayer.LanguageServices.BindingQueue1+<>c__DisplayClass35_0[[System.__Canon, System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].<DispatchQueueItem>b__0()
   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(System.Threading.Thread, System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef, System.Threading.Thread)
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool+WorkerThread.WorkerThreadStart()
   at System.Threading.Thread.StartCallback()
[Error - 1:50:58 PM] Connection to server got closed. Server will not be restarted.

Code Changes Checklist

• New or updated unit tests added
• All existing tests pass (dotnet test)
• Code follows contributing guidelines
• Logging/telemetry updated if relevant
• No protocol or behavioral regressions

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