C#: Update test as we now also implicitly gets flow summary for StreamReader.

Author: michaelnebel

csharp/ql/test/library-tests/dataflow/library/FlowSummaries.expected

@@ -1097,6 +1097,19 @@
 | System.IO;Stream;true;ReadAsync;(System.Byte[],System.Int32,System.Int32,System.Threading.CancellationToken);;Argument[-1];Argument[0];taint |
 | System.IO;Stream;true;Write;(System.Byte[],System.Int32,System.Int32);;Argument[0];Argument[-1];taint |
 | System.IO;Stream;true;WriteAsync;(System.Byte[],System.Int32,System.Int32,System.Threading.CancellationToken);;Argument[0];Argument[-1];taint |
+| System.IO;StreamReader;false;Read;();;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;Read;(System.Char[],System.Int32,System.Int32);;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;Read;(System.Span<System.Char>);;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadAsync;(System.Char[],System.Int32,System.Int32);;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadAsync;(System.Memory<System.Char>,System.Threading.CancellationToken);;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadBlock;(System.Char[],System.Int32,System.Int32);;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadBlock;(System.Span<System.Char>);;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadBlockAsync;(System.Char[],System.Int32,System.Int32);;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadBlockAsync;(System.Memory<System.Char>,System.Threading.CancellationToken);;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadLine;();;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadLineAsync;();;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadToEnd;();;Argument[-1];ReturnValue;taint |
+| System.IO;StreamReader;false;ReadToEndAsync;();;Argument[-1];ReturnValue;taint |
 | System.IO;StringReader;false;Read;();;Argument[-1];ReturnValue;taint |
 | System.IO;StringReader;false;Read;(System.Char[],System.Int32,System.Int32);;Argument[-1];ReturnValue;taint |
 | System.IO;StringReader;false;Read;(System.Span<System.Char>);;Argument[-1];ReturnValue;taint |