Prefer `gh release` CLI over third-party actions where possible

[adamkudrna]

The release-drafter/release-drafter action still has its place in our workflow as long as it provides PR grouping (which the GH release notes generator cannot do).

However, the EndBug/version-check action can be probably avoided in favour of the gh CLI.

[adamkudrna]

This is a follow-up of #551 and #531.