Load precompiled module from library loaded by the OS loader?

#### Feature

Precompiled modules are ELF files that seemingly are able to be linked into executables. Would it be possible to let them load using OS loader (either by linking them into application binary, or linking into shared object and `dlopen`), and then import this code into wasmtime Module?

#### Benefit

Support of platforms that doesn't allow mapping pages as executable, like iOS or game consoles.

#### Implementation

`Module::deserialize` variant that takes pointers to already loaded segments and fills them into `CodeMemory` struct instead of mmaping them. Probably also needs #7349 to be useful.