Remove count items dead code

[williamlardier]

• MongoClientInterface still implements some duplicate (and outdated) logic implemented by count items in s3utils.
• Dependency functions are removed, and tests cleaned accordingly.
• Some functions were also wrong: checking the PENSIEVE collection to check for transient locations was relying on undefined field from a collection that is also not used anymore in Zenko 2. The logic itself is only related to statistics, currently overwritten by the count-items implementation. The Cloudserver logic around ops-metrics is unaffected, as it only uses the internal countItems function, used to read the count items results.
• Transient locations are still supported as usual: they are unrelated to these functions.

I am expecting a functional test to fail in cloudserver after this change is merged, as the countItems function is functionally tested there.

Issue: ARSN-459

[bert-e]

Hello williamlardier,

My role is to assist you with the merge of this
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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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.15%. Comparing base (6285cb7) to head (59a71d6).
Report is 63 commits behind head on development/8.2.

Additional details and impacted files

@@                 Coverage Diff                 @@
##           development/8.2    #2287      +/-   ##
===================================================
+ Coverage            66.79%   67.15%   +0.36%     
===================================================
  Files                  216      216              
  Lines                17452    17279     -173     
  Branches              3619     3580      -39     
===================================================
- Hits                 11657    11604      -53     
+ Misses                5791     5671     -120     
  Partials                 4        4              

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[williamlardier]

/approve

[bert-e]

In the queue

The changeset has received all authorizations and has been added to the
relevant queue(s). The queue(s) will be merged in the target development
branch(es) as soon as builds have passed.

The changeset will be merged in:

• ✔️ development/8.2

The following branches will NOT be impacted:

• development/6.4
• development/7.10
• development/7.4
• development/7.70
• development/8.1

There is no action required on your side. You will be notified here once
the changeset has been merged. In the unlikely event that the changeset
fails permanently on the queue, a member of the admin team will
contact you to help resolve the matter.

IMPORTANT

Please do not attempt to modify this pull request.

• Any commit you add on the source branch will trigger a new cycle after the
  current queue is merged.
• Any commit you add on one of the integration branches will be lost.

If you need this pull request to be removed from the queue, please contact a
member of the admin team now.

The following options are set: approve

[bert-e]

I have successfully merged the changeset of this pull request
into targetted development branches:

• ✔️ development/8.2

The following branches have NOT changed:

• development/6.4
• development/7.10
• development/7.4
• development/7.70
• development/8.1

Please check the status of the associated issue ARSN-459.

Goodbye williamlardier.