Remove axum-test from dev-dependencies

[mikeee]

Description

dev-deps

axum-test = "16.4.0" # TODO: Remove problematic dep
litemap = "=0.7.4" # TODO: Remove pinned - linked to axum_test
zerofrom = "=0.1.5" # TODO: Remove pinned - linked to axum_test

Axum-test does not keep to an msrv and is breaking with 1.78 due to indirect deps of litemap and zerofrom.

Release Note

RELEASE NOTE: