chore: make templates bundle-able

[mingxuanzhangsfdx]

What does this PR do?

This PR removes the friction that blocks templates from bundling.

1. transition the generator imports to static imports.
2. remove the templates-bundle publishing workflow since templates will be bundle-able.

What issues does this PR fix or reference?

@W-15736930@

[peternhale]

QA Notes:

Linked this module to plugin-templates and smoke tested the template commands.

• Commands that only have one template (project)
• Commands that have multiple types (Apex class)
• Used Default
• Used named

Smoke tests worked fine.