Use correct class file version when copying anonymous objects in inliner

Generally, using state.classFileVersion would be enough because we
report an error when inlining bytecode into a class file with a lower
target version (see INLINE_FROM_HIGHER_PLATFORM). However, we take maxOf
with the original version of the class file, _just in case_ the user has
suppressed this error (for example, to workaround some other corner case
in the compiler).

 #KT-30744 Fixed

compiler/testData/compileKotlinAgainstCustomBinaries/inlineAnonymousObjectWithDifferentTarget/library/A.java

@@ -0,0 +1,3 @@
+public interface A {
+    public static void method() {}
+}

compiler/testData/compileKotlinAgainstCustomBinaries/inlineAnonymousObjectWithDifferentTarget/library/foo.kt

@@ -0,0 +1,5 @@
+inline fun foo(crossinline x: () -> Unit): Any = object {
+    init {
+        x()
+    }
+}

compiler/testData/compileKotlinAgainstCustomBinaries/inlineAnonymousObjectWithDifferentTarget/output.txt

@@ -0,0 +1 @@
+OK

compiler/testData/compileKotlinAgainstCustomBinaries/inlineAnonymousObjectWithDifferentTarget/source.kt

@@ -0,0 +1,5 @@
+fun main() {
+    foo {
+        A.method()
+    }
+}