Generate changelog for 2.8.3

changelogs/2.8.3.md

changelogs/unreleased/debian-remove-binutils-dependency.md

changelogs/unreleased/drop-ubuntu-trusty.md

...sed/gh-4617-fix-lua-stack-usage-while-results-encoding.md

changelogs/unreleased/gh-4669-applier-reconfig-reconnect.md

...elogs/unreleased/gh-5364-define-bit-wise-operations-rules

changelogs/unreleased/gh-5389-fix-assertion-during-grant.md

...ased/gh-5958-rollbacked-replace-background-built-index.md

...ed/gh-5977-build-index-in-background-with-hash-primary.md

changelogs/unreleased/gh-5998-disallow-yields-ddl.md

...eleased/gh-6010-disallow-negative-double-to-unsigned-cast

changelogs/unreleased/gh-6088-xlog-raft-lua.mg

...ed/gh-6092-invalid-listen-address-make-tarantool-blind.md

...logs/unreleased/gh-6140-fix-mvcc-crash-in-ddl-rollback.md

changelogs/unreleased/gh-6157-fix-error-on-copy-empty-str.md

changelogs/unreleased/gh-6217-fix-net-box-connect-error.md

changelogs/unreleased/gh-6224-lj-dualnum-luajit-gdb.md

...ogs/unreleased/gh-6227-fix-bytecode-register-allocator.md

...ased/gh-6248-fix-lua-api-misuse-while-results-encoding.md

changelogs/unreleased/gh-6263-fix-dirty-read-after-alter.md