Remove ee/changelogs

This directory is no longer used in the new changelog workflow setup.

ee/changelogs/233139-scim_finder_to_support_email_fragment_as_username.yml

----
-title: SCIM get users API to search for email fragment as username
-merge_request: 38807
-author:
-type: changed

ee/changelogs/322079-allow-overnight-oncall-shifts.yml

----
-title: Allow overnight shifts for oncall rotations
-merge_request: 57202
-author:
-type: added

ee/changelogs/323627-add-members-oncall-schedule-data-to-helper.yml

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-title: Add oncall schedule data to member user API
-merge_request: 58848
-author:
-type: added

ee/changelogs/geo-fix-oauth-redirect.yml

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-title: 'Geo: Fix sign in on secondary with relative URL'
-merge_request: 37445
-author:
-type: fixed

ee/changelogs/security-360-prevent-any-users-from-deleting-metrics-issue-images.yml

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-title: Fix permissions for modifying issue metric images
-merge_request:
-author:
-type: security

ee/changelogs/unreleased-ee/alexives-35913-geo_pause_via_api.yml

----
-title: Add rake geo:replication:pause to pause replication from a secondary node
-merge_request: 29515
-author:
-type: added

ee/changelogs/unreleased-ee/alexives-35913-update_ui_remove_pause_button.yml

----
-title: Update node ui to have status indicator instead of button for replication
-merge_request: 34571
-author:
-type: added