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/testData/compileKotlinAgainstCustomBinaries/preReleaseCompilerAgainstPreReleaseLibraryStableLanguageVersion/output.txt

@@ -1,8 +1 @@
-error: incompatible classes were found in dependencies. Remove them from the classpath or use '-Xskip-metadata-version-check' to suppress errors
+OK
-compiler/testData/compileKotlinAgainstCustomBinaries/preReleaseCompilerAgainstPreReleaseLibraryStableLanguageVersion/source.kt:5:16: error: class 'a.A' is compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler
-fun baz(param: A) {
-               ^
-compiler/testData/compileKotlinAgainstCustomBinaries/preReleaseCompilerAgainstPreReleaseLibraryStableLanguageVersion/source.kt:6:5: error: class 'a.AKt' is compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler
-    foo()
-    ^
-COMPILATION_ERROR

compiler/testData/compileKotlinAgainstCustomBinaries/preReleaseCompilerAgainstPreReleaseLibraryStableLanguageVersion/source.kt

@@ -2,6 +2,7 @@ package usage
 
 import a.*
 
-fun baz(param: A) {
+fun baz(param: A): A {
     foo()
+    return param
 }

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

@@ -271,7 +271,7 @@ 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()
             }