v2.1: deplete compute meter for vm errors (backport of #3751 and #3994)

[jstarry]

Problem

Implements solana-foundation/solana-improvement-documents#182 by making sure that programs that fail with VM errors consume the remaining compute budget to simplify compute unit handling. Uses new feature gate.

Summary of Changes

• Consume remaining compute budget for all VM errors except those that originate from syscalls
• Add new feature gate for cu depletion

Feature Gate Issue: #3993

[mergify]

The Firedancer team maintains a line-for-line reimplementation of the
native programs, and until native programs are moved to BPF, those
implementations must exactly match their Agave counterparts.
If this PR represents a change to a native program implementation (not
tests), please include a reviewer from the Firedancer team. And please
keep refactors to a minimum.

[bw-solana]

LGTM.

All the "active" code behind the (currently) disabled feature switch, and some solid unit tests to ensure the feature behaves as expected. Thanks!