[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolve/arguments/varargProjection.kt

@@ -0,0 +1,9 @@
+open class Base
+class Sub : Base()
+
+fun foo(vararg arg: Base) {}
+
+fun bar(base: Array<Base>, sub: Array<Sub>) {
+    foo(*base)
+    foo(*sub)
+}