Update template for new crate names

[ebuchman]

Moved this out of #233

Dave asked:

@hu55a1n1 can you double check I didn't break anything when updating this file crates/enclave/core/quartz.manifest.template , i just wanted to make sure I was supposed to update the code here to quartz-enclave-core

[hu55a1n1]

I think we can delete the crates/enclave/core/quartz.manifest.template file because it isn't being used anywhere (we only need these files for enclave bins). We kept it just as an example but now that we already have a gramine manifest template for transfers app we can delete this.