[Enhancement] expose review comments link as on normal comments

[6543]

Gitea version: 0e799c2 (v1.12.0-dev)

normal comments can be linked via: https://gitea/user/repo/pulls/123#issuecomment-123456 where 123456 is the commentID

make same for reviews

[6543]

usefull for #11224 too

[6543]

ok it actuarly works but there is no link in the UI to it as with other comments

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