remove cosbench useless and unused folder

[SylvainSenechal]

Issue: ZENKO-5261

180 seconds of work to remove 823 of useless code 🌚

[bert-e]

Hello sylvainsenechal,

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name	description	privileged	authored
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/bypass_jira_check	Bypass the Jira issue check	⭐
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Available commands

name	description	privileged
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/build	Re-start a fresh build TBA
/force_reset	Delete integration branches & pull requests, and restart merge process from the beginning.
/reset	Try to remove integration branches unless there are commits on them which do not appear on the source branch.

Status report is not available.

[bert-e]

Waiting for approval

The following approvals are needed before I can proceed with the merge:

• the author

• 2 peers

[benzekrimaha]

Did you try to bump zenko in artesca to try without cosbench if this is not breaking anything?

[SylvainSenechal]

Did you try to bump zenko in artesca to try without cosbench if this is not breaking anything?

No, I ctrl f cosbench in artesca, I can only find occurence in one documentation file about test benchmark, written by Rached 4 years ago. It looks like its also stale in artesca