Make prefix used in HMACSHAStrategy configurable

[mitar]

Preflight checklist

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Ory Network Project

No response

Describe your problem

I think this is primarily vanity, but HMACSHAStrategy used hard-coded ory_ prefix and I would prefer to have it be something branded for my own project.

Describe your ideal solution

I think just additional config option to configure the prefix would work well.

Workarounds or alternatives

Copying the HMACSHAStrategy and changing that small string. I think this is done in authelia.

Version

latest master

Additional Context

No response