Disallow break or continue across a function boundary

Code containing breaks or continues that attempt to jump across a
function boundary weren't detected during analysis but would crash
the compiler during code generation. Add diagnostics for these kinds
of errors.

Example:

fun f() {
    while (true) {
        fun inner() {
            continue
        }
    }
}

 #KT-4334 Fixed

compiler/testData/diagnostics/tests/controlStructures/jumpAcrossFunctionBoundary.kt

@@ -0,0 +1,17 @@
+fun call(f: () -> Unit) = f()
+
+fun f1() {
+    @outer while (true) {
+        call {
+            <!BREAK_OR_CONTINUE_JUMPS_ACROSS_FUNCTION_BOUNDARY!>break@outer<!>
+        }
+    }
+}
+
+fun f2() {
+    do {
+        fun inner() {
+            <!BREAK_OR_CONTINUE_JUMPS_ACROSS_FUNCTION_BOUNDARY!>continue<!>
+        }
+    } while (true)
+}