Refine warning messages for KT-36770

^KT-36770 Fixed

compiler/testData/cli/jvm/jspecifyByLv15.out

@@ -1,7 +1,7 @@
 compiler/testData/cli/jvm/jspecifyUsage.kt:2:11: warning: type mismatch: inferred type is Nothing? but String was expected
     a.foo(null)
           ^
-compiler/testData/cli/jvm/jspecifyUsage.kt:3:5: warning: unsafe use of a nullable receiver of type String?. See https://youtrack.jetbrains.com/issue/KT-36770 for details
+compiler/testData/cli/jvm/jspecifyUsage.kt:3:5: warning: unsafe use of a nullable receiver of type String?
     a.bar().hashCode()
     ^
 OK

compiler/testData/cli/jvm/jspecifyByLv16.out

@@ -1,7 +1,7 @@
 compiler/testData/cli/jvm/jspecifyUsage.kt:2:11: warning: type mismatch: inferred type is Nothing? but String was expected
     a.foo(null)
           ^
-compiler/testData/cli/jvm/jspecifyUsage.kt:3:5: warning: unsafe use of a nullable receiver of type String?. See https://youtrack.jetbrains.com/issue/KT-36770 for details
+compiler/testData/cli/jvm/jspecifyUsage.kt:3:5: warning: unsafe use of a nullable receiver of type String?
     a.bar().hashCode()
     ^
 OK

compiler/testData/cli/jvm/jspecifyDefault.out

@@ -1,7 +1,7 @@
 compiler/testData/cli/jvm/jspecifyUsage.kt:2:11: warning: type mismatch: inferred type is Nothing? but String was expected
     a.foo(null)
           ^
-compiler/testData/cli/jvm/jspecifyUsage.kt:3:5: warning: unsafe use of a nullable receiver of type String?. See https://youtrack.jetbrains.com/issue/KT-36770 for details
+compiler/testData/cli/jvm/jspecifyUsage.kt:3:5: warning: unsafe use of a nullable receiver of type String?
     a.bar().hashCode()
     ^
 OK

compiler/testData/cli/jvm/jspecifyWarn.out

@@ -1,7 +1,7 @@
 compiler/testData/cli/jvm/jspecifyUsage.kt:2:11: warning: type mismatch: inferred type is Nothing? but String was expected
     a.foo(null)
           ^
-compiler/testData/cli/jvm/jspecifyUsage.kt:3:5: warning: unsafe use of a nullable receiver of type String?. See https://youtrack.jetbrains.com/issue/KT-36770 for details
+compiler/testData/cli/jvm/jspecifyUsage.kt:3:5: warning: unsafe use of a nullable receiver of type String?
     a.bar().hashCode()
     ^
 OK

compiler/testData/cli/jvm/jsr305MigrationFqNameIgnore.out

@@ -1,7 +1,7 @@
 compiler/testData/cli/jvm/jsr305Migration.kt:2:19: warning: type mismatch: inferred type is Nothing? but String was expected
     annotated.foo(null)
                   ^
-compiler/testData/cli/jvm/jsr305Migration.kt:4:5: warning: unsafe use of a nullable receiver of type String?. See https://youtrack.jetbrains.com/issue/KT-36770 for details
+compiler/testData/cli/jvm/jsr305Migration.kt:4:5: warning: unsafe use of a nullable receiver of type String?
     annotated.nullable().length
     ^
 OK

compiler/testData/cli/jvm/jsr305MigrationIgnore.out

@@ -1,7 +1,7 @@
 compiler/testData/cli/jvm/jsr305Migration.kt:2:19: warning: type mismatch: inferred type is Nothing? but String was expected
     annotated.foo(null)
                   ^
-compiler/testData/cli/jvm/jsr305Migration.kt:4:5: warning: unsafe use of a nullable receiver of type String?. See https://youtrack.jetbrains.com/issue/KT-36770 for details
+compiler/testData/cli/jvm/jsr305Migration.kt:4:5: warning: unsafe use of a nullable receiver of type String?
     annotated.nullable().length
     ^
 OK

compiler/testData/cli/jvm/jsr305MigrationWarn.out

@@ -4,7 +4,7 @@ compiler/testData/cli/jvm/jsr305Migration.kt:2:19: warning: type mismatch: infer
 compiler/testData/cli/jvm/jsr305Migration.kt:3:19: warning: type mismatch: inferred type is Nothing? but String was expected
     annotated.bar(null)
                   ^
-compiler/testData/cli/jvm/jsr305Migration.kt:4:5: warning: unsafe use of a nullable receiver of type String?. See https://youtrack.jetbrains.com/issue/KT-36770 for details
+compiler/testData/cli/jvm/jsr305Migration.kt:4:5: warning: unsafe use of a nullable receiver of type String?
     annotated.nullable().length
     ^
 OK