Wrong handling of input type in remote file sources secrets

[wm75]

Describe the bug

When creating a remote file source that requires a password secret that secret can currently not consist of digits only.
If that's the case, you're getting (with a Webdav plugin-based remote file source for example):

"""
Problem with template definition causing invalid configuration, template expanded without error but resulting configuration is invalid. please contact admin to correct template: 1 validation error for WebdavFileSourceConfiguration
password
Input should be a valid string [type=string_type, input_value=1234, input_type=int]
For further information visit https://errors.pydantic.dev/2.9/v/string_type
"""

Galaxy Version and/or server at which you observed the bug
Galaxy Version: 24.1
Commit: 051c5ab

To Reproduce
Steps to reproduce the behavior:

1. On usegalaxy.eu, go to 'User -> Preferences -> Manage Your Remote File Sources'
2. Try to create "An FTP server" connection with FTP Password 1234 (you can fill in dummy information for the other fields)

Expected behavior
A string consisting only of digits should still be considered a valid string and be accepted as a valid password.

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
Add any other context about the problem here.

[davelopez]

I had a quick look and this seems to be the jinja2 template interpreting the value as a number in:

galaxy/lib/galaxy/util/config_templates.py

Line 187 in 1042d38

return key, template.render(**template_variables)

I've never used jinja2, maybe there's some option to control that?