Currently we only supports 7 ciphers (`aes-(128|192|256)-ecb` and
`aes-(128|256)-(cbc|gcm)`) in `node:crypto`, but `crypto.getCiphers`
returns other supported cipher names. That confuses `npm:openpgp`
package and causes https://github.com/denoland/deno/issues/26875.
This PR makes `getCiphers` return actually supported cipher names.
With this change, the example given in #26875 can create private and
public key files.
closes #26875
91150706d8