feat: allow except tests

[kukkok3]

Description

This PR changes the clippy lint from allow-unwrap-in-tests to allow-except-in-tests, to make sure the tests are better commented

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module

[kukkok3]

@jmgilman any idea why this is failing? I did modify clippy.toml in catalyst-ci first

[Mr-Leshiy]

@kukkok3 If want to update some stuff related to the Earthly build, you also need to bump catalyst-ci version in Earthfiles.
As for example here

catalyst-voices/catalyst-gateway/Earthfile

Line 7 in be868f6

FROM github.com/input-output-hk/catalyst-ci/earthly/rust:v2.0.11+rust-base

.

But don't worry, I will apply this update in this PR #173. So I think we can close this PR