[FIR Test] Migrate AbstractFirLoadCompiledKotlin to new test infrastructure

Also introduce two different modes for those tests:
- load metadata compiled with K1
- load metadata compiled with K2

compiler/testData/loadJava/compiledKotlin/fromLoadJava/RemoveRedundantProjectionKind.fir.k2.txt

@@ -0,0 +1,6 @@
+public abstract interface RemoveRedundantProjectionKind : R|kotlin/Any| {
+    public abstract fun f(p0: R|kotlin/collections/Collection<kotlin/CharSequence?>?|): R|kotlin/Unit|
+
+    public abstract fun f(p0: R|kotlin/Comparable<kotlin/CharSequence?>?|): R|kotlin/Unit|
+
+}