Parse attributes in extended VTL0 APIs

[femiatl]

VTL0 sends data to the secure kernel during and after initial boot. Use the new attributes parameter to extend load_kdata, allowing it to process data after boot and use the improved format for sending data from VTL0. Small, simple data buffers like certificates can be sent efficiently with the same APIs used for larger aggregated data like module info.

The new data format is leveraged to reduce the size of the kernel string table passed from ~10MB (all of rodata) to ~250KB.

The validate_module and validate_kexec APIs are extended to use the new attributes.

[sangho2]

@femiatl Could you please resolve the conflicts such that CI can work on this PR.

[sangho2]

It seems that this change is based on new ABI to simplify data transfer. Good idea! As @tgopinath-microsoft noted in #652, this cannot be merged yet.

One overall feedback or requested change: This PR needs some detailed comments to explain new ABI and data structures. Also, some functions are with old comments (e.g., these functions no longer get nranges), and some other functions are without any comments.

[github-actions]

🤖 SemverChecks 🤖 ⚠️ Potential breaking API changes detected ⚠️

Click for details

--- failure function_parameter_count_changed: pub fn parameter count changed ---

Description:
A publicly-visible function now takes a different number of parameters.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#fn-change-arity
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/function_parameter_count_changed.ron

Failed in:
  litebox_platform_lvbs::mshv::vsm::mshv_vsm_protect_memory now takes 3 parameters instead of 2, in /home/runner/work/litebox/litebox/litebox_platform_lvbs/src/mshv/vsm.rs:266
  litebox_platform_lvbs::mshv::vsm::mshv_vsm_load_kdata now takes 3 parameters instead of 2, in /home/runner/work/litebox/litebox/litebox_platform_lvbs/src/mshv/vsm.rs:348

--- failure inherent_method_missing: pub method removed or renamed ---

Description:
A publicly-visible method or associated fn is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/inherent_method_missing.ron

Failed in:
  Symbol::from_bytes, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-main/075ab7c6d077e0d81bb34571e3dec9b66e93a36a/litebox_platform_lvbs/src/mshv/vsm.rs:1766

--- failure method_parameter_count_changed: pub method parameter count changed ---

Description:
A publicly-visible method now takes a different number of parameters, not counting the receiver (self) parameter.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#fn-change-arity
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/method_parameter_count_changed.ron

Failed in:
  litebox_platform_lvbs::mshv::vsm::SymbolTable::build_from_container now takes 2 parameters instead of 4, in /home/runner/work/litebox/litebox/litebox_platform_lvbs/src/mshv/vsm.rs:1864