Move SourceElement and SourceFile to :deserialization.common

Remove dependency on `:core:descriptors` from `:core:deserialization:deserialization.common`

core/descriptors/build.gradle.kts

@@ -12,6 +12,7 @@ dependencies {
     compile(project(":core:type-system"))
     compile(kotlinStdlib())
     compile(project(":kotlin-annotations-jvm"))
+    api(project(":core:deserialization:deserialization.common"))
 }
 
 sourceSets {

core/deserialization/deserialization.common/build.gradle.kts

@@ -8,8 +8,8 @@ javaHome = rootProject.extra["JDK_16"] as String
 
 dependencies {
     compile(project(":core:metadata"))
+    api(project(":core:descriptors.common"))
     compile(project(":core:util.runtime"))
-    compile(project(":core:descriptors"))
     compile(commonDep("javax.inject"))
 }