R2-2317 add support for SSE-C via `workerd` bindings

[helloimalastair]

Give R2 Bindings support for creating/interacting with SSE-C encrypted objects.

Tests run on branch mikkel/R2-2317. Please merge once feature lands

[github-actions[bot]]

All contributors have signed the CLA ✍️ ✅
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[helloimalastair]

I have read the CLA Document and I hereby sign the CLA

[harshal317]

• [x] R2 API Support