* chore: Bump CI actions/checkout and cache

---------

Signed-off-by: Rafael Ribeiro Raposo <rafaelraposo@spotify.com>

# TL;DR
Remove checkstyle maven plugin.

## Type
 - [ ] Bug Fix
 - [ ] Feature
 - [ ] Plugin

## Are all requirements met?

 - [x] Code completed
 - [ ] Smoke tested
 - [ ] Unit tests added
 - [ ] Code documentation added
 - [ ] Any pending items have an associated Issue

## Complete description
Checkstyle has always been a pain to use and we can hardly recall it
really helps with anything. In #318, checkstyle disagrees with spotless,
which is very much pointless.

## Tracking Issue
_NA_

## Follow-up issue
_NA_

Signed-off-by: Hongxin Liang <honnix@users.noreply.github.com>

# TL;DR
Adds support for testing `SdkDynamicWorkflowTask` (dynamic workflows)
using `SdkTestingExecutor`, enabling assertions on their generated DAGs
similarly to regular workflows.

## Type
 - [ ] Bug Fix
 - [x] Feature
 - [ ] Plugin

## Are all requirements met?

 - [x] Code completed
 - [x] Smoke tested
 - [x] Unit tests added
 - [x] Code documentation added
 - [x] Any pending items have an associated Issue

## Complete description
This PR extends `SdkTestingExecutor` to support dynamic workflows
(`SdkDynamicWorkflowTask`) by wrapping them into a lightweight
delegating workflow internally. This allows developers to test the
structure and outputs of dynamic workflows using the same mechanisms
used to test regular workflows, improving consistency and coverage in
unit testing Flyte tasks.

There were no existing issues or tracking requests for this feature — it
was implemented to fill a current gap in testing capabilities for
dynamic workflows in `flytekit-testing`.

## Tracking Issue
NA

## Follow-up issue
NA

---------

Signed-off-by: Rodolfo Carvalho <rodolfo.ueg@gmail.com>