Replace ResultContext with ErrContext in error_set usage #1156

Job	Run time
sanity / Validate commit messages	4s
sanity / Clippy	3m 22s
sanity / Check	3m 0s
sanity / Test documentation	3m 41s
sanity / Rustfmt	13s
sanity / Sort dependencies	27s
sanity / Unused dependencies	52s
build and test macOS-aarch64	4m 37s
build and test Linux-x86_64-musl	6m 39s
build Windows-x86_64	12m 45s
backwards_compatibility / check_commit_message	5s
backwards_compatibility / build_and_test	4m 31s
finalize_pr	1s
	40m 17s

Provide feedback