add nested xml input format for bucket quota

[SylvainSenechal]

ISSUE: CLDSRV-818

[bert-e]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.30%. Comparing base (9d4f902) to head (13940d6).
✅ All tests successful. No failed tests found.

Additional details and impacted files

Files with missing lines	Coverage Δ
lib/api/bucketUpdateQuota.js	97.91% <100.00%> (+2.26%)	⬆️

... and 3 files with indirect coverage changes

@@                 Coverage Diff                 @@
##           development/9.3    #6037      +/-   ##
===================================================
+ Coverage            84.27%   84.30%   +0.03%     
===================================================
  Files                  204      204              
  Lines                12957    12959       +2     
===================================================
+ Hits                 10919    10925       +6     
+ Misses                2038     2034       -4     

Flag	Coverage Δ
file-ft-tests	67.39% <100.00%> (-0.01%)	⬇️
kmip-ft-tests	28.09% <0.00%> (-0.01%)	⬇️
mongo-v0-ft-tests	68.62% <100.00%> (+0.01%)	⬆️
mongo-v1-ft-tests	68.74% <100.00%> (+0.02%)	⬆️
multiple-backend	35.24% <0.00%> (-0.01%)	⬇️
sur-tests	35.55% <50.00%> (-0.98%)	⬇️
sur-tests-inflights	37.42% <50.00%> (+0.03%)	⬆️
unit	69.91% <0.00%> (-0.02%)	⬇️
utapi-v2-tests	34.26% <0.00%> (+0.01%)	⬆️

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[SylvainSenechal]

@francoisferrand I tried the curl command provided in the doc we gave to the client :
curl -X PUT "http://localhost:8000/testb/?quota=true" --user "accessKey1:verySecretKey1" --aws-sigv4 "aws:amz:us-east-1:s3" -d '{"quota" : 32}'

In that case, curl will not set the content-type header. So I think it's tricky to modify the logic around the body parsing by using content type, because clients can't be expected to set that header so no matter what we will have to use a fallback which is basically the code that we already have with the try/catch

[bert-e]

Incorrect fix version

The Fix Version/s in issue CLDSRV-818 contains:

• 9.2.13

Considering where you are trying to merge, I ignored possible hotfix versions and I expected to find:

• 9.2.15

• 9.3.0

Please check the Fix Version/s of CLDSRV-818, or the target
branch of this pull request.

[bert-e]

Waiting for approval

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

• the author

• 2 peers

[SylvainSenechal]

wanna do this now, because this change is for the cloudserver quota client feature, and I need an image with this new code to run in the test pipeline. Otherwise can't merge the new client