remove ManuallyDrop from DropHelper

[msmouse]

use Option instead

Description

How Has This Been Tested?

Key Areas to Review

Type of Change

• [ ] New feature
• [ ] Bug fix
• [ ] Breaking change
• [ ] Performance improvement
• [ ] Refactoring
• [ ] Dependency update
• [ ] Documentation update
• [ ] Tests

Which Components or Systems Does This Change Impact?

• [ ] Validator Node
• [ ] Full Node (API, Indexer, etc.)
• [ ] Move/Aptos Virtual Machine
• [ ] Aptos Framework
• [ ] Aptos CLI/SDK
• [ ] Developer Infrastructure
• [ ] Move Compiler
• [ ] Other (specify)

Checklist

• [ ] I have read and followed the CONTRIBUTING doc
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I identified and added all stakeholders and component owners affected by this change as reviewers
• [ ] I tested both happy and unhappy path of the functionality
• [ ] I have made corresponding changes to the documentation

[trunk-io[bot]]

⏱️ 1h 26m total CI duration on this PR

| Job | Cumulative Duration | Recent Runs | |---|---|---| | [execution-performance / single-node-performance](https://github.com/aptos-labs/aptos-core/actions/runs/11944623057/job/33298148845) | 54m | [🟥](https://github.com/aptos-labs/aptos-core/actions/runs/11944623057/job/33296031632) [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623057/job/33296527939) [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623057/job/33298148845)  | | [rust-move-tests](https://github.com/aptos-labs/aptos-core/actions/runs/11944623047/job/33295878841) | 12m | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623047/job/33295878841)  | | [check-dynamic-deps](https://github.com/aptos-labs/aptos-core/actions/runs/11944621406/job/33295872459) | 6m | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623051/job/33295877064) [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944621406/job/33295872459)  | | [test-target-determinator](https://github.com/aptos-labs/aptos-core/actions/runs/11944623163/job/33295884424) | 5m | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623163/job/33295884424)  | | [execution-performance / test-target-determinator](https://github.com/aptos-labs/aptos-core/actions/runs/11944623057/job/33295877376) | 5m | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623057/job/33295877376)  | | [rust-cargo-deny](https://github.com/aptos-labs/aptos-core/actions/runs/11944623056/job/33295888425) | 2m | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623056/job/33295888425)  | | [semgrep/ci](https://github.com/aptos-labs/aptos-core/actions/runs/11944623078/job/33295877159) | 50s | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944621413/job/33295872522) [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623078/job/33295877159)  | | [general-lints](https://github.com/aptos-labs/aptos-core/actions/runs/11944623056/job/33295888763) | 26s | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623056/job/33295888763)  | | [file_change_determinator](https://github.com/aptos-labs/aptos-core/actions/runs/11944623056/job/33295880089) | 13s | [⬜](https://github.com/aptos-labs/aptos-core/actions/runs/11944621410/job/33295872974) [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623056/job/33295880089)  | | [file_change_determinator](https://github.com/aptos-labs/aptos-core/actions/runs/11944623163/job/33295883987) | 11s | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623163/job/33295883987)  | | [permission-check](https://github.com/aptos-labs/aptos-core/actions/runs/11944623039/job/33295876906) | 8s | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944621248/job/33295871980) [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623039/job/33295876906)  | | [permission-check](https://github.com/aptos-labs/aptos-core/actions/runs/11944623059/job/33295876893) | 6s | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944621269/job/33295872010) [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623059/job/33295876893)  | | [permission-check](https://github.com/aptos-labs/aptos-core/actions/runs/11944623163/job/33295877969) | 4s | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623163/job/33295877969)  | | [determine-docker-build-metadata](https://github.com/aptos-labs/aptos-core/actions/runs/11944623163/job/33295883764) | 4s | [🟩](https://github.com/aptos-labs/aptos-core/actions/runs/11944623163/job/33295883764)  | | [rust-move-tests](https://github.com/aptos-labs/aptos-core/actions/runs/11944621409/job/33295873022) | 1s | [⬜](https://github.com/aptos-labs/aptos-core/actions/runs/11944621409/job/33295873022)  |

🚨 1 job on the last run was significantly faster/slower than expected

Job	Duration	vs 7d avg	Delta
check-dynamic-deps	4m	1m

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[msmouse]

piggybacked.