Release the repository from CI

[psmyrek]

Suggested merge commit message (convention)

Internal: Redesign the release process to allow it to be processed from CircleCI.

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Additional information

• Part of https://github.com/cksource/ckeditor5-internal/issues/3710.
• Requires: https://github.com/ckeditor/ckeditor5-dev/pull/969.

[coveralls]

Pull Request Test Coverage Report for Build bd75a20d-1194-4824-b968-1e6defed6046

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build df589606-9b54-4e40-a823-6df69ceb67e9:	0.0%
Covered Lines:	166
Relevant Lines:	166

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💛 - Coveralls