ansible-scylla-node: use scylla_bootstrap_wait_time_sec for API port wait

The 'wait for the API port to come up on all nodes' task used a
hardcoded 600s timeout, inconsistent with the surrounding bootstrap
logic which allows scylla_bootstrap_wait_time_sec (default 7h) for
node startup and cluster health checks. Under loaded CI runners the
API port can take longer than 600s to come up even after the CQL
port has already responded, causing flaky 'Timeout when waiting for
127.0.0.1:10000' failures unrelated to the change under test.

Co-authored-by: Manjot Singh <ManjotS@users.noreply.github.com>

Author: cursoragent

ansible-scylla-node/tasks/common.yml

@@ -352,7 +352,7 @@
       wait_for:
         port: "{{ scylla_api_port }}"
         host: "{{ scylla_api_address }}"
-        timeout: 600
+        timeout: "{{ scylla_bootstrap_wait_time_sec | int }}"
 
     - name: wait for the cluster to become healthy
       shell: