Harden the signal recovery of AArch64 SVC/MSR/MRS gates

[Sangho Lee (sangho2)]

This PR refactors the signal recovery of the AArch64 SVC, MSR, and MRS gates with rewriter-owned recovery plans, following the x18 gate model.

[github-actions]

🤖 SemverChecks 🤖 ⚠️ Potential breaking API changes detected ⚠️

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--- 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/v0.50.0/src/lints/inherent_method_missing.ron

Failed in:
  ClassifiedGate::commit_offset, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-ulitebox/e35f2d9fbebc1f1bd5d4c05f8b166855c9f99867/litebox_syscall_rewriter/src/aarch64.rs:3249
  GateMetadata::commit_offset, previously in file /home/runner/work/litebox/litebox/target/semver-checks/git-ulitebox/e35f2d9fbebc1f1bd5d4c05f8b166855c9f99867/litebox_syscall_rewriter/src/aarch64.rs:3201