[Detox] add --skipBuild arg

scripts/test-e2e.js

 
 const android = _.includes(process.argv, '--android');
 const release = _.includes(process.argv, '--release');
+const skipBuild = _.includes(process.argv, '--skipBuild');
 
 run();
 
   const configuration = `${prefix}.${suffix}`;
   const cleanup = process.env.CI ? `--cleanup` : ``;
 
-  exec.execSync(`detox build --configuration ${configuration}`);
+  !skipBuild && exec.execSync(`detox build --configuration ${configuration}`);
   exec.execSync(`detox test --configuration ${configuration} --platform ${platform} ${cleanup}`);
 }