Change: deprecate environment storage bytesUsed for kibUsed

[shreddedbacon]

General Checklist

• Affected Issues have been mentioned in the Closing issues section
• Documentation has been written/updated
• PR title is ready for inclusion in changelog

Database Migrations

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This introduces a deprecation on bytesUsed when interacting with environment storage queries and mutations.

When retrieving environment storage sizes, bytesUsed is provided as the name when the value of this data is actually kibibytes. This PR is the first step in the removal of bytesUsed and renaming to kibUsed. A follow up PR will introduce the actual breaking change to remove it in a future release.

Additionally, bytesUsed is an Int type, which has a 32bit integer limitation. The new kibUsed input is a Float type to allow greater input.

For now, bytesUsed is still the required input for addOrUpdateEnvironmentStorage with kibUsed as an optional argument. kibUsed will be preferred though if it is provided. Unfortunately, as bytesUsed is still an Int large numbers will still cause an error if they are provided, until bytesUsed is completely removed from the API in a future version

Closing issues

closes #2245

[rocketeerbkw]

There could be nicer ways to deprecate this schema but it's primary use is for integrations with other systems (not end-user facing) and it requires platform-owner privileges, so I don't think it's worth any further effort.