WW-3714 Deprecate and repackage common APIs part 2

[kusalk]

WW-3714

This PR deprecates and provides repackaged replacements for the following APIs, ahead of their permanent migration in Struts 7.0:

• com.opensymphony.xwork2.ActionInvocation
• com.opensymphony.xwork2.interceptor.PreResultListener

Full backwards compatibility with the deprecated types are retained - I achieved this by doing the following:

1. Move 'old' class to new package
2. Update any imports in this moved class to replacement types if applicable/available
3. Create a class in the old package (where the original class was) which extends the new updated one
4. Add back any APIs/methods which are not inherited due to updated imports from (2)
5. Provide default implementations for inherited APIs/methods which were not present in the 'old' class, delegating to the APIs added back in (4)
6. Create internal adapter classes as necessary to achieve (5)

Another variation of this approach that is sometimes employed is to have the new class extend the deprecated one instead. I deliberately avoided this as it pollutes the new/replacement class with compatibility code and references to deprecated types. I'd prefer compatibility code to appear in the deprecated class instead, to avoid confusion for anyone inspecting the bytecode/source of the APIs.

Additionally, this approach usually facilitates much more straightforward deletion of the deprecated classes when ready. However, in this case, this point is moot as the deletion PR for Struts 7.0 has already been prepared. We can simply discard all changes in my series of deprecation PRs when we merge them forward from master to release/struts-7-0-x.

[sonarcloud]

Quality Gate failed

Failed conditions
B Reliability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

Catch issues before they fail your Quality Gate with our IDE extension SonarLint