feat: update to edition 2024, fix deprecated warnings

[kemingy]

The current MSRV is 1.85.1, which is higher than the MSRA required by edition 2024. So we're free to upgrade to this new edition.

Also fixed the deprecated warning of assert_cmd::Command::cargo_bin.

According to the assert_cmd limitation, we need to use escargot in the horustctl test since horust is not a bin there.

Motivation and Context

Description

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (a change to man pages or other documentation)

Checklist:

• I have updated the documentation accordingly.
• I have added tests to cover my changes.