Split CDK3 server adapter integration tests into separated classes

I decided to divide quite time-consuming CDK server adapter integration tests into smaller test cases due to time that is needed to run all of these test cases in one test class. The one class with all server adapter test cases will be divide into 4 independent classes.
org.jboss.tools.cdk.ui.bot.test.server.adapter.CDK3IntegrationTest will be split into
CDK3IntegrationStartTest
CDK3IntegrationRestartTest
CDK3IntegrationDockerTest
CDK3IntegrationOpenshiftTest
It will be possible to run cdk pr-check job much faster, if it would contain only one complex test case, instead of 4 test cases that each requires to start cdk 3 server adapter.