JS: support -Xskip-metadata-version-check for incompatible ABI libraries

Allow the compiler to read such libraries without any errors, at the
risk of crashing with an exception.

Also fix a minor bug in the diagnostic message in LibrarySourcesConfig
and in the corresponding test in KotlinJpsBuildTest

compiler/testData/compileKotlinAgainstCustomBinaries/wrongMetadataVersionJsSkipVersionCheck/library/a.kt

@@ -0,0 +1,11 @@
+package a
+
+open class A {
+    class Nested
+
+    fun method() {}
+}
+
+fun foo() {}
+var bar = 42
+typealias TA = String