Cover dynamic bitwise and shift binary operators

The pretty DynamicTests exercised arithmetic and relational binary operators on
dynamic operands, but never the bitwise and shift operators (& | ^ << >>). Add a
BitwiseAndShiftBinaryOperators case so this operator family is pinned by a
round-trip test alongside the others.

Assisted-by: Claude:claude-opus-4-8:Claude Code

ICSharpCode.Decompiler.Tests/TestCases/Pretty/DynamicTests.cs

@@ -310,6 +310,23 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 			}
 		}
 
+		private static void BitwiseAndShiftBinaryOperators(dynamic a, dynamic b)
+		{
+			DynamicTests.MemberAccess(a & b);
+			DynamicTests.MemberAccess(a & 1);
+			DynamicTests.MemberAccess(a & null);
+			DynamicTests.MemberAccess(a | b);
+			DynamicTests.MemberAccess(a | 1);
+			DynamicTests.MemberAccess(a | null);
+			DynamicTests.MemberAccess(a ^ b);
+			DynamicTests.MemberAccess(a ^ 1);
+			DynamicTests.MemberAccess(a ^ null);
+			DynamicTests.MemberAccess(a << b);
+			DynamicTests.MemberAccess(a << 1);
+			DynamicTests.MemberAccess(a >> b);
+			DynamicTests.MemberAccess(a >> 1);
+		}
+
 		private static void RelationalOperators(dynamic a, dynamic b)
 		{
 			DynamicTests.MemberAccess(a == b);