enable queries over the set of files supported by project API method copy_default_execution_script

### 📝 Description of the feature

## problem

it is not possible to determine the set of arguments that copy_default_execution_script supports
for example you can't create a drop down list in a UI through which a user could select a script

## suggested solution

add project api method ``get_default_execution_scripts(**query_parameters)`` where query parameters can be version and product and other fields that are relevant in the script naming scheme.

the result is a list of script names that can be passed to copy_default_execution_script
(the get_default_execution_scripts method shouldn't copy the files)

### 💡 Steps for implementing the feature

_No response_

### 🔗 Useful links and references

_No response_

Start by reading the existing project API method copy_default_execution_script and how its supported script names are determined. Define the relevant query parameters for get_default_execution_scripts and ensure it returns names without copying files; verify that each returned name can be passed to copy_default_execution_script.

Written by the indexing model from the issue text.