Validate pipeline CLI command does not work when replacing nested template

[ecrupper]

Description

Get the following error:

vela validate pipeline --template-file nested:template.yml 
FATA[0000] local template with name nested not included in pipeline templates

Even though nested is referenced in a template.

This could be "fixed" by removing these validation lines in the CLI, but that feels like a missed opportunity.

This issue does not exist in render_inline because the templates slice is kept updated throughout the compilation process.

Value

Even though the compilation works, the command fails, making validate essentially worthless if you want to local replace any nested templates.

Useful Information

1. What is the output of vela --version?

v0.23.1

2. What operating system is being used?

3. Any other important details?