Replace the trove4j collections usages with the fastutil ones

The trove4j library is licensed under LGPL, and that causes some troubles while working with it. The fastutil library provides the same functionality in the context of our needs, and is licensed under the Apache license.
^KTI-1135 In Progress

js/js.ast/build.gradle.kts

@@ -6,7 +6,7 @@ plugins {
 dependencies {
     api(project(":core:descriptors"))
     compileOnly(intellijCore())
-    compileOnly(commonDependency("org.jetbrains.intellij.deps:trove4j"))
+    compileOnly(commonDependency("org.jetbrains.intellij.deps.fastutil:intellij-deps-fastutil"))
 }
 
 sourceSets {

js/js.ast/src/org/jetbrains/kotlin/js/backend/JsReservedIdentifiers.java

@@ -4,7 +4,7 @@
 
 package org.jetbrains.kotlin.js.backend;
 
-import gnu.trove.THashSet;
+import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet;
 
 import java.util.Collections;
 import java.util.Set;
@@ -142,7 +142,7 @@ public class JsReservedIdentifiers {
                 "$stack", "$stackDepth", "$location",
         };
 
-        reservedGlobalSymbols = new THashSet<String>(commonBuiltins.length);
+        reservedGlobalSymbols = new ObjectOpenHashSet<>(commonBuiltins.length);
         Collections.addAll(reservedGlobalSymbols, commonBuiltins);
     }
 

js/js.ast/src/org/jetbrains/kotlin/js/backend/JsToStringGenerationVisitor.java

@@ -4,6 +4,7 @@
 
 package org.jetbrains.kotlin.js.backend;
 
+import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet;
 import kotlin.text.StringsKt;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.js.backend.ast.*;
@@ -12,7 +13,6 @@ import org.jetbrains.kotlin.js.backend.ast.JsIntLiteral;
 import org.jetbrains.kotlin.js.backend.ast.JsVars.JsVar;
 import org.jetbrains.kotlin.js.common.IdentifierPolicyKt;
 import org.jetbrains.kotlin.js.util.TextOutput;
-import gnu.trove.THashSet;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.*;
@@ -190,7 +190,7 @@ public class JsToStringGenerationVisitor extends JsVisitor {
      * because the statements designated by statementEnds and statementStarts are
      * those that appear directly within these global blocks.
      */
-    private Set<JsBlock> globalBlocks = new THashSet<JsBlock>();
+    private Set<JsBlock> globalBlocks = new ObjectOpenHashSet<>();
 
     @NotNull
     protected final TextOutput p;

js/js.sourcemap/build.gradle.kts

@@ -8,7 +8,7 @@ dependencies {
     compileOnly(project(":js:js.parser")) // TODO remove, required for JSON AST
     compileOnly(project(":js:js.frontend")) // TODO remove
     compileOnly(intellijCore())
-    compileOnly(commonDependency("org.jetbrains.intellij.deps:trove4j"))
+    compileOnly(commonDependency("org.jetbrains.intellij.deps.fastutil:intellij-deps-fastutil"))
 }
 
 sourceSets {

js/js.sourcemap/src/org/jetbrains/kotlin/js/sourceMap/SourceMap3Builder.kt

@@ -4,7 +4,7 @@
  */
 package org.jetbrains.kotlin.js.sourceMap
 
-import gnu.trove.TObjectIntHashMap
+import com.intellij.util.containers.ObjectIntHashMap
 import org.jetbrains.kotlin.js.parser.sourcemaps.*
 import java.io.File
 import java.io.IOException
@@ -17,13 +17,6 @@ class SourceMap3Builder(
     private val pathPrefix: String
 ) : SourceMapBuilder {
 
-    private class ObjectIntHashMap<T> : TObjectIntHashMap<T>() {
-        override fun get(key: T): Int {
-            val index = index(key)
-            return if (index < 0) -1 else _values[index]
-        }
-    }
-
     private val out = StringBuilder(8192)
 
     private val sources = ObjectIntHashMap<SourceKey>()
@@ -98,7 +91,7 @@ class SourceMap3Builder(
 
     private fun getSourceIndex(source: String, fileIdentity: Any?, contentSupplier: Supplier<Reader?>): Int {
         val key = SourceKey(source, fileIdentity)
-        var sourceIndex = sources[key]
+        var sourceIndex = sources.get(key)
         if (sourceIndex == -1) {
             sourceIndex = orderedSources.size
             sources.put(key, sourceIndex)
@@ -109,7 +102,7 @@ class SourceMap3Builder(
     }
 
     private fun getNameIndex(name: String): Int {
-        var nameIndex = names[name]
+        var nameIndex = names.get(name)
         if (nameIndex == -1) {
             nameIndex = orderedNames.size
             names.put(name, nameIndex)