Added logback into GCP IT module (GONRG-3445)

Type of change

• Bug Fix
• Feature

Does this introduce a change in the core logic?

• [NO]

Does this introduce a change in the cloud provider implementation, if so which cloud?

• AWS
• Azure
• GCP
• IBM

Does this introduce a breaking change?

• [NO]

What is the current behavior?

The id_token is exposed in int-tests logs

What is the new/expected behavior?

The id_token logs are disabled

testing/workflow-test-gcp/src/resources/logback-test.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+  <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
+  <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%yellow([%thread]) %highlight(| %-5level |) %green(%d) %cyan(| %logger{15} |) %highlight(%msg) %n</pattern>
+      <charset>utf8</charset>
+    </encoder>
+  </appender>
+  <root level="INFO">
+    <appender-ref ref="CONSOLE" />
+  </root>
+</configuration>