Do not report pre-release errors if release LV is used in pre-release compiler

This commit effectively reverts
d386712903.

The reason is that when using a release language version, you can only
"see" the subset of a pre-release library which consists of released and
supported features, so reporting an error is not helpful there. Also, it
presents a problem currently when using kotlinc 1.3 (which is
pre-release) with language version 1.2 (stable) against the bundled
stdlib of version 1.3 (pre-release)

 #KT-21267 Declined

compiler/tests/org/jetbrains/kotlin/codegen/JvmModuleProtoBufTest.kt

@@ -45,7 +45,7 @@ class JvmModuleProtoBufTest : KtUsefulTestCase() {
                 "-d", tmpdir.path,
                 "-module-name", moduleName,
                 "-language-version", compileWith.versionString
-        ) + extraOptions + listOfNotNull("-Xskip-metadata-version-check".takeIf { KotlinCompilerVersion.isPreRelease() }))
+        ) + extraOptions)
 
         val mapping = ModuleMapping.loadModuleMapping(
                 File(tmpdir, "META-INF/$moduleName.${ModuleMapping.MAPPING_FILE_EXT}").readBytes(), "test",

compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt

@@ -275,7 +275,7 @@ class LanguageVersionSettingsImpl @JvmOverloads constructor(
         }
     }
 
-    override fun isPreRelease(): Boolean = languageVersion.isPreRelease() ||
+    override fun isPreRelease(): Boolean = KotlinCompilerVersion.isPreRelease() ||
             specificFeatures.any { (feature, state) ->
                 state == LanguageFeature.State.ENABLED && feature.forcesPreReleaseBinariesIfEnabled()
             }