env agnostic VPs

[tzemanovic]

Describe your changes

Rewrite native VPs to be env-agnostic (WASM or native).

The goal is to:

• break the dep on vp crate from systems crates that implement their VP to use vp_env instead
• this will unblock tx & VP ctx and tests refactors #3787 to move WASM Ctx into vp_env so that it can be used directly by crates that depend on vp_env as an implementation of trait VpEnv that can be used for testing without additional deps (same refactor has already been applied in this P for tx_env and tx Ctx)
• vp_env can then depend on vm to implement VP eval over WASM without running into dep cycle

Checklist before merging

• If this PR has some consensus breaking changes, I added the corresponding breaking:: labels
  • This will require 2 reviewers to approve the changes

[codecov]

Codecov Report

Attention: Patch coverage is 88.52459% with 98 lines in your changes missing coverage. Please review.

Project coverage is 72.70%. Comparing base (d32e856) to head (63d1113).
Report is 18 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/governance/src/vp/pgf.rs	44.23%	29 Missing ⚠️
crates/node/src/protocol.rs	68.65%	21 Missing ⚠️
crates/shielded_token/src/vp.rs	84.93%	11 Missing ⚠️
crates/governance/src/vp/mod.rs	96.19%	10 Missing ⚠️
crates/ethereum_bridge/src/vp/bridge_pool_vp.rs	94.07%	9 Missing ⚠️
crates/node/src/shell/finalize_block.rs	0.00%	8 Missing ⚠️
crates/ethereum_bridge/src/vp/eth_bridge_vp.rs	94.44%	3 Missing ⚠️
crates/trans_token/src/vp.rs	97.08%	3 Missing ⚠️
crates/vp_env/src/lib.rs	66.66%	2 Missing ⚠️
crates/ethereum_bridge/src/vp/nut_vp.rs	94.44%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3807      +/-   ##
==========================================
+ Coverage   72.69%   72.70%   +0.01%     
==========================================
  Files         338      338              
  Lines      104467   104536      +69     
==========================================
+ Hits        75944    76006      +62     
- Misses      28523    28530       +7     

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