feat(core-processor): make dlmalloc a program library

[clearloop]

Resolves #1059

• introduce gwasm for program libraries
• introduce gwasm-dlmalloc which is the wasm library version of dlmalloc
• provide tests somewhere

What happens

this PR has introduced gwasm feature for gstd, if gwasm enabled, the program will use dlmalloc as a shared library which requires the backend linking the dlmalloc wasm library when executing the program

for the result of the size of demo_ping.opt.wasm after compilation

allocator	size
gwasm	4.0k
galloc	8.0k

How to test it?

TBA

Open questions

1. where to perform the link operation?

imo the final solution will be in pallet-gear that users can import their uploaded libraries, or some official library like ERC-20, but for the mvp version, introducing it in pallet-gear is risky, so considering core-processor atm

2. where to store the program libraries?

hardcode in our node ( dirty but practical ) or upload it as storage ( storage IO requires more weights )

@gear-tech/dev

[clearloop]

waiting for #2934

[breathx]

Temporary closing as blocked