Introduce experimental -Xuse-javac compilation mode

In this mode, javac AST and Symbol files are used during
Kotlin compilation instead of PSI / binary stuff.
Later, they are reused for Java file compilation.
javac in this mode is integrated into kotlinc.

compiler/testData/cli/jvm/extraHelp.out

@@ -14,6 +14,8 @@ where advanced options include:
                              Load definitions of built-in declarations from module dependencies, instead of from the compiler
   -Xscript-resolver-environment=<key=value[,]>
                              Script resolver environment in key-value pairs (the value could be quoted and escaped)
+  -Xuse-javac                Use javac for Java source and class files analysis
+  -Xjavac-arguments=<option[,]> Java compiler arguments
   -Xno-inline                Disable method inlining
   -Xrepeat=<count>           Repeat compilation (for performance analysis)
   -Xskip-metadata-version-check Load classes with bad metadata version anyway (incl. pre-release classes)