Add provider feature for LEA/.../... algorithm

[onacit]

I asked a question for the `LEA/CBC/PKCS5Padding' with JCE feature.
https://stackoverflow.com/q/79124184/330457

Can I use the LEAEngine with JCE API?

[onacit]

Seems that is no LEA-related stuff at Package org.bouncycastle.jcajce.provider.symmetric
.
Thank you.

[dghgit]

LEA is now available in the BC provider on https://www.bouncycastle.org/betas