Move AcmeMockServerBuilder out of testsuite/shared

The only use of testsuite/shared's AcmeMockServerBuilder in core or full is in org.jboss.as.test.integration.management.cli.SecurityCommandsTestCase so move the class to testsuite/standalone.

That will eliminate the need for a dep on mockserver-netty in testsuite/shared which in turn will eliminate a lot of annoying CVE scanner warns in full WF due to a transitive dep on an old netty version.

Both wf core and full wf control the version of netty they use, but this transitive dep escapes that and results in scanner noise.

As part of this I'll also bump the netty version in core's testbom to the latest.