update sei config in chains.yaml

[udpatil]

Description

This updates the sei chains.yaml config to better reflect changes that have been made in the sei build process more recently.

Testing

Tested by building sei image with the commands and verified that the binary is runnable in the container

./heighliner build -c sei -g 3.0.5
docker run -it --rm --entrypoint sh sei:3.0.5

[agouin]

We might be able to change this to cosmos now without the shared library requirement so that we get a fully static binary

[udpatil]

@agouin I updated to use the cosmos dockerfile for static binary. lmk if this looks good, and I'll need your help to run the workflow for CI

[agouin]

Thank you for this update! I'm happy we can build it as a standard cosmos chain now.