General improvements to aya-log efficiency

[shaneutt]

Developers can run into problems with the BPF verifier like invalid size of register spill despite having what might not seem (to them) like a very large or complex eBPF program.

The purpose of this task is to strategize and implement optimizations for aya-log to reduce it's footprint and reduce complexity, as developers may particularly lean on using it in the early stages of development and so this is one way we can provide more breathing room for developers.

(originally discussed in #505, and recommended by @alessandrod)