feat: add variables to set AppProject, labels and destination cluster

[lentidas]

Description of the changes

This PR:

• Adds the required variables and configuration to allow the module to be deployed on a different cluster than Argo CD.
• Adds the possibility of placing the application inside a specified Argo CD project in order to avoid having a single project for each application throughout multiple clusters.
• Adds labels and a variable to add more labels to the Argo CD application to make it easier to sort applications on the web interface of Argo CD.

All these changes are made in preparation for having a centralized Argo CD that controls applications throughout multiple clusters.

⚠️ Do a Rebase and merge.

Breaking change

• No

Tests executed on which distribution(s)

• KinD
• EKS (AWS)
• SKS (Exoscale)

This is pending, we discussed on a meeting that we should not approve these for the time being. But thank you for taking the time! ;)