Docs migration: Project/Group tokens usage

As a gitlab migration perceptive (new release of gitlab at EF next major version 15). There is some deprecated feature around gitlab PAT management.

https://docs.gitlab.com/ee/user/project/settings/project_access_tokens.html

The ability to create project access tokens without expiry was deprecated in GitLab 15.4 and is planned for removal in GitLab 16.0. 
When this ability is removed, existing project access tokens without an expiry are planned to have an expiry added. The automatic adding of an expiry occurs on GitLab.com during the 16.0 milestone. 
The automatic adding of an expiry occurs on self-managed instances when they are upgraded to GitLab 16.0. This change is a breaking change.

Oniro project created 2 PAT included one with no expire date. see the list.

name	scopes	project	creator	created on	last used	expires
docs-commit	write_repository	eclipse/oniro-core/oniro-readthedocs-aggregated	Andrei Gherzan	2022-07-25	Never	Never
ostcbot_token	api	eclipse/oniro-core/oniro	Pawel Stankiewicz	2022-03-30	2022-06-23	2025-03-31

Can you give the used cases for this two PAT?