[version] Bump up version to 6.27.0-rc1

[version] Upgrade psutil to 5.9.8

[fix] Personal access token name fix

Until now a random string was generated as a personal access token name
in the schema upgrade script that copies auth session tokens to the
personal_access_tokens table. In rare cases the random generator could
return the same random string twice. For this reason in PostgreSQL an
incremental integer is used instead of the random name.

Until now all auth session tokens became a personal access token. From
now only the "can_expire = false" tokens become personal access tokens.

Merge pull request #4594 from gulyasgergely902/cc_diff_incorrect_gerr…

…it_json_output

[feat] Check if file path is absolute or not in gerrit py.

[version] Bump up version 6.26.0-rc1

Add OWASP Top 10 guideline

Merge pull request #4477 from cservakt/parsing-guideline

[Refactor] Guideline stat parser

Add libldap to docker image

The codechecker server faield to connect to to
SSL ldap server without this package

Add recommendation for the minimum python version

Merge commit from fork

[Don't merge as is! v6.24.5] Move from cookie-based to token-based authentication