Grails 7 - Spring Security - Cleanup

[jdaugherty]

Follow-up to #1034

This PR:

• Converts to ContainerGebSpec
• Updates to the latest asset plugin
• Runs the tests always instead of only on a PR
• Converts to the newer java version syntax in gradle

Note: issues still after this PR:

• We need to update the s2 quick start apps

[jdaugherty]

@codeconsole @matrei @jamesfredley This was my attempt at trying to use the grails bom, start using ContainerGebSpec, and update to the latest versions so we can release the M1 of grails. There are a lot of errors here and I think they've been here for awhile since the tests were not running outside of PRs. Does anyone have any ideas on some of these errors?

[jdaugherty]

Looks like we had some usages of ReportingGebSpec so I replaced those - I also added the @Integration to the tests in functional-tests since they were all under the integration directory.

[jdaugherty]

Closing for @matrei PR