VEP Docker: include GeneSplicer binary

[nuno-agostinho]

Fixes #1590: compile genesplicer command for use in VEP Docker/Singularity

This only includes the compiled binary and not the associated training data (because of its size). The data still needs to be mounted by the user as usual for a Docker container.

Usage example

Build the Docker image from this modified Dockerfile and run this command inside Docker:

vep --id rs1348242192 --database --force \
    --plugin GeneSplicer,/plugins/GeneSplicer/genesplicer,${human_data}

Ensembl/VEP_plugins#689: Future improvements to GeneSplicer.pm could make this command easier to use.

[olaaustine]

Hi @nuno-agostinho,
Thank you very much for this change.
This seems fine to me.
Tested on docker using the test example above.
Waiting for the failed tests to pass before merging.
Thank you
Ola.

[olaaustine]

Merged into release/112 and main.