doc: add missing CHANGES entries for all versions >= 1.0.0

Up to now, CHANGES entries for older releases where only added to the
corresponding stable branches, so they were missing in the master
branch. This commit adds the missing entries, taking them from the
respective stable branches.

Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/10545)