Disable two tests in ExprTests in DEBUG, non-NetFramework only - they fail due to StackOverflow exception on NetCore+DEBUG configuration.. (#14637)

* Disable two failing ExprTests in DEBUG mode

* Do not ignore the tests in DEBUG+NETFRAMEWORK configuration.

Author: safesparrow

tests/service/ExprTests.fs

@@ -722,6 +722,13 @@ let test{0}ToStringOperator   (e1:{1}) = string e1
 
 """
 
+let ignoreTestIfStackOverflowExpected () =
+#if !NETFRAMEWORK && DEBUG
+    Assert.Ignore("Test is known to fail in DEBUG when not using NetFramework. Use RELEASE configuration or NetFramework to run it.")
+#else
+    ()
+#endif
+
 /// This test is run in unison with its optimized counterpart below
 [<Test>]
 let ``Test Unoptimized Declarations Project1`` () =
@@ -3191,6 +3198,7 @@ let BigSequenceExpression(outFileOpt,docFileOpt,baseAddressOpt) =
 
 [<Test>]
 let ``Test expressions of declarations stress big expressions`` () =
+    ignoreTestIfStackOverflowExpected ()
     let cleanup, options = ProjectStressBigExpressions.createOptions()
     use _holder = cleanup
     let exprChecker = FSharpChecker.Create(keepAssemblyContents=true)
@@ -3207,6 +3215,7 @@ let ``Test expressions of declarations stress big expressions`` () =
 
 [<Test>]
 let ``Test expressions of optimized declarations stress big expressions`` () =
+    ignoreTestIfStackOverflowExpected ()
     let cleanup, options = ProjectStressBigExpressions.createOptions()
     use _holder = cleanup
     let exprChecker = FSharpChecker.Create(keepAssemblyContents=true)