Increase smoker VM memory from 2GB to 4GB

Smoker tests are intermittently failing with Selenium
ReadTimeoutError when chromedriver becomes unresponsive late
in the test run. With 2GB RAM and 2 parallel Chrome instances
cycling through ~78 tests, the VM runs out of resources.

See theforeman/smoker#48

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: zjhuntin

pipelines/vars/install_base.yml

@@ -5,5 +5,5 @@ forklift_proxy_name: "pipe-{{ pipeline_type }}-proxy-{{ pipeline_version }}-{{ p
 forklift_smoker_name: "pipe-{{ pipeline_type }}-smoker-{{ pipeline_version }}-{{ pipeline_os }}"
 smoker_box:
   box: centos9-stream
-  memory: 2048
+  memory: 4096
 bats_test_name_prefix: "{{ pipeline_os }} {{ pipeline_action }}: "

pipelines/vars/upgrade_base.yml

@@ -6,5 +6,5 @@ forklift_smoker_name: "pipe-up-{{ pipeline_type }}-smoker-{{ pipeline_version }}
 forklift_boxes: "{{ {forklift_server_name: server_box, forklift_smoker_name: smoker_box} }}"
 smoker_box:
   box: centos9-stream
-  memory: 2048
+  memory: 4096
 bats_test_name_prefix: "{{ pipeline_os }} {{ pipeline_action }}: "