Graylog 6.0: update configuration script

[YuryHrytsuk]

What do these changes do?

• Fix long-standing issue with waiting for graylog to be online (we did not wait enough)
• Switch from index rotation (deprecated in Graylog 6.0) to data tiering
• Add Graylog major version check to the script

Related issue/s

Related PR/s

• https://git.speag.com/oSparc/osparc-ops-deployment-configuration/-/merge_requests/1002

Checklist

• [X] I tested and it works

[mrnicegyu11]

I guess there is a PR introducing those envs in osparc-config?

[YuryHrytsuk]

I guess there is a PR introducing those envs in osparc-config?

Yeah, check the Related PRs in this issue's body