issue: 3928407 Remove VLAs

[pasis]

TODO Complete removal from sock-redirect.cpp and sockinfo_tcp.cpp

Description

clang-18 generates a warning that VLA is a clang extension.

What

Remove VLAs.

Why ?

Fix clang-18 build.

Change type

What kind of change does this PR introduce?

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update
• [x] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation content changes
• [ ] Tests
• [ ] Other

Check list

• [ ] Code follows the style de facto guidelines of this project
• [ ] Comments have been inserted in hard to understand places
• [ ] Documentation has been updated (if necessary)
• [ ] Test has been added (if possible)