Add new Docker-DB versions

[tkilias]

Summary

A new Docker-DB version which we need to support have been released.

Versions:
8.27.0 (2024-05--02)
8.26.0 (2024-04-22)
8.25.0 (2024-02-15)
8.24.0 (2023-12-20)
8.23.1 (2023-11-07)
8.23.0 (2023-11-06)
8.22.0 (2023-08-29)
8.21.0 (2023-08-04)
8.20.0 (2023-07-12)
8.19.0 (2023-06-15) (not available)
8.18.1 (2023-06-02) (already done)

7.1.26 (2024-04-19)
7.1.25 (2023-12-04)
7.1.24 (2023-10-24)
7.1.23 (2023-09-11)
7.1.22 (2023-07-24)
7.1.21 (2023-06-16)
7.1.20 (2023-05-11)
7.1.19 (2023-03-21)
7.1.18 (2023-02-17)

Task(s)

• Add config for Docker-DB X.Y.Z
• Change default image version to X.Y.Z
• Update LATEST_DB_VERSION in test_environment_options.py
• Update currently supported version(s) in user_guide.rst
• Update changelog