Do not produce libraries json declarations dump

It's no longer needed for checking binary compatibility.
Clean build of these libraries is no longer required too.

Cleanup build.gradle of binary-compatibility-validator.

libraries/tools/binary-compatibility-validator/build.gradle

@@ -30,23 +30,17 @@ sourceSets {
     }
 }
 
-def testCasesDeclarationsDump = "${buildDir}/cases-declarations.json".toString()
-
 compileTestKotlin {
     kotlinOptions {
-        freeCompilerArgs = ["-Xdump-declarations-to=$testCasesDeclarationsDump", "-Xnormalize-constructor-calls=enable"]
+        freeCompilerArgs = ["-Xnormalize-constructor-calls=enable"]
     }
 }
 
 test {
-    dependsOn cleanCompileTestKotlin
     dependsOn configurations.testArtifacts
 
     systemProperty 'overwrite.output', System.getProperty("overwrite.output", "false")
     systemProperty 'kotlinVersion', project.version
     systemProperty 'testCasesClassesDirs', sourceSets.test.output.classesDirs.asPath
-    systemProperty 'testCasesDeclarations', testCasesDeclarationsDump
     jvmArgs '-ea'
-
-    ignoreFailures = System.getenv("kotlin_build_ignore_test_failures") == 'yes'
 }