CLI: improve error message for -Xjdk-release=1.6/1.7

#KT-66174 Fixed

compiler/testData/cli/jvm/jdkRelease6WithJvmTarget9.args

@@ -0,0 +1,8 @@
+-Xjdk-release=1.6
+-jvm-target
+9
+-jdk-home
+$JDK_11_0
+$TESTDATA_DIR$/jdkRelease.kt
+-d
+$TEMP_DIR$

compiler/testData/cli/jvm/jdkRelease6WithJvmTarget9.out

@@ -0,0 +1,2 @@
+error: '-Xjdk-release=1.6' option conflicts with '-jvm-target 9'. Please change the value of the 'jvm-target' option to 1.8
+COMPILATION_ERROR

compiler/testData/cli/jvm/jdkRelease6WithoutExplicitJvmTarget.out

@@ -1,2 +1,2 @@
-error: '-Xjdk-release=1.6' option requires explicit JVM target. Please specify the '-jvm-target' option
+error: '-Xjdk-release=1.6' option requires JVM target explicitly set to 1.8. Please specify the '-jvm-target' option
 COMPILATION_ERROR