Do not use `DENO_KV_PATH` environment variable for the kv path.

[ycmjason]

In Deno Deploy, DENO_ prefixed environment are not allowed. (See denoland/std#6127)

This makes it impossible to use kv_oauth from another instance of deno deploy that wishes to point to the same Deno Kv remotely.

[iuioiua]

I wasn't aware of this. I think we can go with the obvious solution of changing the environment variable key. Maybe to something like DKV_PATH or similar.

Sorry for the very delayed reply. I no longer maintain this repo.

[kuboon]

DENO_KV_DEFAULT_PATH is added to deno.

denoland/deno#30320