[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/inline/inlineFunction.fir.txt

@@ -0,0 +1,7 @@
+public final inline fun a(): R|kotlin/Unit|
+
+public final inline fun b(): R|kotlin/Unit|
+
+public final inline fun c(crossinline f: R|() -> kotlin/Unit|): R|kotlin/Unit|
+
+public final inline fun d(): R|kotlin/Unit|