ci: CI packaging of llama.cpp dependencies into the binary file by default for Cortex's integration into Jan

[hiento09]

Linked to #1217
Given that: The current CI is publishing the binary file and installer to the release, but the binary does not include the llamacpp engine.
Expectation: Jan will pull the Cortex binary that has the llamacpp engine avx2 pre-integrated.

Bugs:

• bug: Model failed to load with status code: 500, could not load engine llamacpp #1422 (will be solved by this issue)

[hiento09]

Approach:

1. Update Cortex CI: Similar to the old approach like Nitro, ship multiple Cortex binaries including different llamacpp variants.
   
2. Update Jan CI: Modify Jan's CI to pull llamacpp engines from the cortex.llamacpp repo and the Cortex binary file from the cortex repo.

[hiento09]

cc @dan-homebrew @louis-jan @vansangpfiev

[gabrielle-ong]

@hiento09 is this a Sprint21 issue and is there a corresponding PR? Else we can shift it to Sprint22
cc @dan-homebrew

[hiento09]

@hiento09 is this a Sprint21 issue and is there a corresponding PR? Else we can shift it to Sprint22 cc @dan-homebrew

Let shift this issue to sprint 22 @gabrielle-ong , we have not finalized the approach yet