Add possibility to exclude tgz from being uploaded to a chart repository

[lmartella1]

Is this a request for help?:

---

Is this a BUG REPORT or FEATURE REQUEST? (choose one): FEATURE REQUEST

Environment (plugin version, maven version, OS, ...):
Plugin Version: 6.15.0
Maven Version: 3.9.6
OS: Linux/MacOs

What happened:
When using the plugin to upload Helm charts to a chart repository, we want to exclude specific .tgz files to avoid uploading sub-charts.

Assuming outputDirectory be ${project.build.directory}/helm (which resolves to target/helm) with the below content:

find target/helm -type f -name "*.tgz" 
target/helm/app-chart-0.1-SNAPSHOT.tgz
target/helm/charts/library-chart/charts/subchart-1.1.0.tgz

The helm-maven-plugin tries to upload both .tgz to the specified chart repository:

[DEBUG] Found chart file for upload: /Users/lmartella/Dev/app/target/helm/app-chart-0.1-SNAPSHOT.tgz
[DEBUG] Found chart file for upload: /Users/lmartella/Dev/app/target/helm/charts/library-chart/charts/subchart-lib-1.1.0.tgz

What you expected to happen:
It would be helpful to have an exclude property to filter out subdirectories containing .tgz files that should not be pushed.

For instance, by setting:

<uploadExcludes>
  <uploadExclude>${project.build.directory}/helm/charts/*</uploadExclude>
</uploadExcludes>	

I would expect the helm maven plugin to only push the following artefact and exclude all the ones under charts/*:

[DEBUG] Found chart file for upload: /Users/lmartella/Dev/app/target/helm/app-chart-0.1-SNAPSHOT.tgz

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know:

We use the helm-maven-plugin only for the upload goal, as Helm packaging is handled by Quarkus.