Add bucket quota apis

[SylvainSenechal]

ISSUE: CLDSRVCLT-4

[SylvainSenechal]

This will allow importing with subpath, for example

import { BucketQuotaClient } from '@scality/cloudserverclient/quota'

[SylvainSenechal]

We have to create a new separate service, as the other client is json, but the quota apis are xml.
And anyways it might just be better for code organisation.

[SylvainSenechal]

Ended up creating a wrapper, it will be easier to use as you will see in the tests, and i was kinda forced to do it because of the update quota api. Basically we probably made a mistake when designing the update quota apis, which wants to receive a structure like this :

<quota>1000002</quota>
But ideally it should look like this :

<parent>
    <quota>1000002</quota>
    <otherProperties>
</parent>

When using the first structure, we can't use integers, so I was forced to send a string like this, but since we want a convenient api, I don't want frontend colleagues to have to call
client.updateQuota(bucket, '<quota>12</quota>')) which is ridiculous
so with this they will be able to send
client.updateQuota(bucket, 12'))

[SylvainSenechal]

Not directly related with the pr, but this is nicer as we will only have one source of truth for smithy version.
I could definitely see someone updating smithy version here and forgetting about updating it in smithy-build.json

[DarkIsDude]

We can create a new folder client or rename these files with client. Quota.ts is not very friendly

[SylvainSenechal]

I had the same thought, but i thought it would look weird because the import path would end up with "client" twice. But still, I moved everything in a /clients folder it will be better