Implement compression of objects before they are saved into the storage
provider. Each container type can specify which algorithm to use
(currently `none` or `zstd`) and the compression level.
Change byte containers from being just a `using` of the relative class
(e.g. `BytesContainer`) to a full fledged subclass. This has the
following benefits:
* The template arguments are now laid out in the container class body,
making it more readable.
* The creation of a new class creates a new symbol, improving
debuggability as now the container classes have their own name rather
than the expanded base class template.
Move member declaration to the top of the class definition of
`GeneratedCodeBasicInfo` and initialize primitive members.
Merge the `run` method into the constructor since all uses have them
happening close to each other.
Giacomo Vercesi