Fix some memory access issues

[abeltrano]

Type

• Bug fix
• Feature addition
• Feature update
• Documentation
• Build Infrastructure

Side Effects

• Breaking change
• Non-functional change

Goals

• Fix use-after-free instances.
• Fix stack buffer overflow instances.

Technical Details

• Avoid calling object destructors explicitly in tests, since this will result in it being called twice, causing use-after-free bugs.
• Fix off-by-1 array size being passed to nla_parse causing a stack buffer overflow.

Test Results

• All unit tests pass with clean ASAN output.

Reviewer Focus

• None

Future Work

• None

Checklist

• Build target all compiles cleanly.
• clang-format and clang-tidy deltas produced no new output.
• Newly added functions include doxygen-style comment block.