Rename Credential property `rawId` into `id`

### Description

Version 4.9.x deprecates `$id` (base64) in favor of `$rawId` (binary).
`$id` will be removed in 5.0.0.
In 5.1.x, `$rawId` will be deprecated in favor of `$id`, which will contain exactly the same value as `$rawId`.
This way, in 6.0.0, only the binary version in `$id` will exist.

### Example

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