Revert "Merge branch 'fshabir/move-gitaly-operation-issue-tempaltes-to-reliability' into 'master'"

What

These templates are for production change issues, not for reliability tracker issues.

Any changes since made to these templates in the reliability project will eventually get ported back to these templates in a subsequent MR following restoration from the merge of this revert.

Why

See conversation at: https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/16385#note_1304562629