chore: disable splits integration tests (#2306)

Co-authored-by: alkatrivedi <58396306+alkatrivedi@users.noreply.github.com>

Author: aksharauke

samples/system-test/spanner.test.js

@@ -2494,8 +2494,8 @@ describe('Autogenerated Admin Clients', () => {
       );
     });
 
-    // add split points
-    it('should add split points', async () => {
+    // add split points, enable when drop database automatically reclaims quota
+    it.skip('should add split points', async () => {
       const output = execSync(
         `node database-add-split-points.js ${INSTANCE_ID} ${DATABASE_ID} ${PROJECT_ID}`,
       );