thar-be-updates: migrate to use configuration file

[jmt-lab]

Issue number: #3625

Closes #3625

Description of changes:

This change migrates the thar-be-updates tool to utilize a configuration file at /etc/thar-be-updates.toml instead of calling back to the settings api.

log:

• migration and template
• migrate thar-be-updates tool to read settings from a config file

Testing done: Tested update from 1.18.0 -> 1.18.1 and ensured settings get populated appropriately

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[jmt-lab]

fix build issue where i left unused imports

[jmt-lab]

• Rebased off latest
• Tested upgrade -> downgrade ensured everything is clean
• Removed tokio dependency
• Adjusted config_path use

[webern]

error: unused import: `PathBuf`
  --> api/thar-be-updates/src/status.rs:13:23
   |
13 | use std::path::{Path, PathBuf};
   |                       ^^^^^^^
   |
   = note: `-D unused-imports` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(unused_imports)]`

[jmt-lab]

updated on latest

[jmt-lab]

Fix the if condition around the boolean value causing it to not be rendered when false

[jmt-lab]

Updated per ben's comments, will begin testing now