[Framework][TESTNET ONLY] Add a testnet only function to allow burning APT

[movekevin]

Description

Add a testnet only function to allow burning APT

How Has This Been Tested?

Unit tests

Key Areas to Review

That this function is only callable on testnet

Type of Change

• [ x ] 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
• [ x ] Aptos Framework
• Aptos CLI/SDK
• Developer Infrastructure
• Move Compiler
• Other (specify)

Checklist

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

[trunk-io]

⏱️ 17m total CI duration on this PR

Job	Cumulative Duration	Recent Runs
rust-move-tests	12m	🟩
check-dynamic-deps	2m	🟩
rust-cargo-deny	2m	🟩
general-lints	27s	🟩
semgrep/ci	21s	🟩
file_change_determinator	12s	🟩
permission-check	3s	🟩
permission-check	2s	🟩

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[github-actions]

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