Report error when suspend call is illegal in the scope

Namely when it's not contained inside coroutine or another suspend function

 #KT-14924 In Progress

compiler/testData/diagnostics/tests/coroutines/illegalSuspendCalls.kt

@@ -0,0 +1,13 @@
+suspend fun foo() {}
+
+fun noSuspend() {
+    <!ILLEGAL_SUSPEND_FUNCTION_CALL!>foo<!>()
+}
+
+class A {
+    init {
+        <!ILLEGAL_SUSPEND_FUNCTION_CALL!>foo<!>()
+    }
+}
+
+val x = <!ILLEGAL_SUSPEND_FUNCTION_CALL!>foo<!>()

compiler/testData/diagnostics/tests/coroutines/illegalSuspendCalls.txt

@@ -0,0 +1,12 @@
+package
+
+public val x: kotlin.Unit
+public suspend fun foo(): kotlin.Unit
+public fun noSuspend(): kotlin.Unit
+
+public final class A {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}