Replace compiler internal API with compiler main function call besides completion

[zhelenskiy]

Second attempt for the reverted previous PR.

[zoobestik]

There is some problems:

• [x] 1. line and ch plus 1 for:

  fun main() {
  dfsdf
  }

  { /* ... */ "start": { "line": 2, "ch": 3 }, /* ... */ }

• [x] 2. Not found main - <errStream>No main method found in project.\n</errStream>

  package org.kotlinlang.play
  
  fun main() {
  println("Hello, World!")
  }

• [x] 3. none some deprecation warnings

  fun main() {
  println("abc"[0].toInt())
  }

  Expected: toInt(): Int' is deprecated. Conversion of Char to Number is deprecated. Use Char.code property instead.

• [x] 4. no className for errors with severities (WARNING, ERROR):

  fun main() {
  val a: dynamic = "abc"
  println(a.charAt(1).repeat(3))     
  }

  Before:

  {"interval":{ /* ... */ }, "message": "..." , "severity": "ERROR", "className":"red_wavy_line" }

[zhelenskiy]

The second point is fixed.