Debugger: Fix evaluation of function declarations with expression bodies (KT-32704)

Before this commit, the substituted FunctionDescriptor didn't have a source element.
As a result, 'CodeFragmentParameterAnalyzer.isCodeFragmentDeclaration' failed to recognize such a descriptor as fragment-local, and it was erroneously captured.

idea/jvm-debugger/jvm-debugger-test/testData/evaluation/singleBreakpoint/functionWithBodyExpression.kt

@@ -0,0 +1,6 @@
+package functionWithBodyExpression
+
+fun main() {
+    //Breakpoint!
+    val a = 5
+}

idea/jvm-debugger/jvm-debugger-test/testData/evaluation/singleBreakpoint/functionWithBodyExpression.kt.fragment

@@ -0,0 +1,4 @@
+fun f2() = "f2"
+f2()
+
+// RESULT: "f2": Ljava/lang/String;

idea/jvm-debugger/jvm-debugger-test/testData/evaluation/singleBreakpoint/functionWithBodyExpression.out

@@ -0,0 +1,11 @@
+LineBreakpoint created at functionWithBodyExpression.kt:5
+Run Java
+Connected to the target VM
+functionWithBodyExpression.kt:5
+Compile bytecode for fun f2() = "f2"
+f2()
+
+// RESULT: "f2": Ljava/lang/String;
+Disconnected from the target VM
+
+Process finished with exit code 0