Fix warnings and clippy lints #1668

Job	Run time
adapt_release	1s
linting / C	6s
linting / Rust	2m 55s
linting / Rust-Audit	2m 51s
linting / License-Headers	3s
linting / Rust-Typos	2m 5s
unit-tests / C	1m 3s
unit-tests / Rust	4m 34s
init / init	5s
build / Rust	9m 47s
build / C	2m 25s
container / debian:testing	15m 10s
container / debian:oldstable	6m 34s
functional / tests	4m 43s
container / debian:stable	11m 51s
container / ghcr:debian:stable	4m 1s
container / greenbone-reg:debian:stable / build-amd64	3m 43s
container / greenbone-reg:debian:stable / build-arm64	0s
container / greenbone-reg:debian:stable / create-multi-arch-manifest	0s
container / greenbone-reg:debian:stable / harbor-replication	0s
container / greenbone-reg:debian:stable / notify	0s
container / greenbone-reg:debian:stable / building-product-compose	0s
smoketests	0s
release	0s
helm	0s
	1h 11m 57s

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