Reverse dependency 'psi' <-> 'frontend.common'

Move ParseUtils to 'psi', and ImportPath to 'frontend.common'.

Now 'psi' depends on 'frontend.common', and that allows to remove
dependency of 'fir:tree:tree-generator' on 'psi', allowing the former to
compile in parallel with the old frontend code.

compiler/frontend.common/build.gradle.kts

@@ -4,15 +4,12 @@ plugins {
 }
 
 dependencies {
-    compile(project(":compiler:psi"))
+    compile(project(":compiler:config"))
     compile(project(":compiler:container"))
     compileOnly(intellijCoreDep()) { includeJars("intellij-core") }
 }
 
-
 sourceSets {
-    "main" {
-        projectDefault()
-    }
+    "main" { projectDefault() }
     "test" {}
-}
+}