fix(parameters): handle base64/binaries in transformer

[dreamorosi]

Description of your changes

As described in #1325, the current implementation of the transformer in the Parameters utility was not handling correctly values returned by AppConfig, which are always of type Uint8Array.

The linked issue has a more in-depth explanation, but essentially this PR updates the transformer so that both json and binary (aka base64) transforms can be used correctly with the provider.

Once merged this PR will close #1325.

How to verify this change

See checks below the PR as well as successful integration tests run here.

Related issues, RFCs

Issue number: #1325

PR status

Is this ready for review?: YES
Is it a breaking change?: NO

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding changes to the examples
• My changes generate no new warnings
• The code coverage hasn't decreased
• I have added tests that prove my change is effective and works
• New and existing unit tests pass locally and in Github Actions
• Any dependent changes have been merged and published
• The PR title follows the conventional commit semantics

Breaking change checklist

• I have documented the migration process
• I have added, implemented necessary warnings (if it can live side by side)

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