Rename/remove some compileKotlinAgainstCustomBinaries tests

"oldJvm*" tests are no longer testing the old JVM backend, so remove
that prefix from them. Also, remove the test "firAgainstOldJvm" because
it is now checking something that cannot NOT work.

compiler/testData/compileKotlinAgainstCustomBinaries/againstStable/source.kt

@@ -0,0 +1,5 @@
+import lib.*
+
+fun main() {
+    get { Box("OK").value }
+}