fix: increase the deletion timeout in ExposedAppReconcilerTest to account for the GC periods

Signed-off-by: xstefank <xstefank122@gmail.com>
(cherry picked from commit 83e885e)

Author: xstefank

samples/exposedapp/src/test/java/io/halkyon/ExposedAppReconcilerTest.java

@@ -77,7 +77,7 @@ void reconcileShouldWork() {
 
         client.resource(app).delete();
 
-        await().atMost(30, TimeUnit.SECONDS).untilAsserted(() -> {
+        await().atMost(60, TimeUnit.SECONDS).untilAsserted(() -> {
             assertThat(client.apps().deployments()
                     .inNamespace(metadata.getNamespace())
                     .withName(metadata.getName()).get(), nullValue());