fuzz: Adding lazy map threshold config to headermap fuzzer

[adisuissa]

Signed-off-by: Adi Suissa-Peleg [email protected]

Commit Message: fuzz: Adding lazy map threshold config to headermap fuzzer
Additional Description:
Adding a configuration parameter to the headermap fuzzer testing the lazy-headermap.

Risk Level: Low (tests only)
Testing: Adding to a fuzzer
Docs Changes: None.
Release Notes: None.

[adisuissa]

@asraa please take a look

[asraa]

Thanks! Could you take a quick look at compile_time_options?

[adisuissa]

Ok, that was strange.
Building with clang's libc++ (--stdlib=libc++) doesn't trigger the assertion, but when building with GCC's it does.
The remove_if code where the assertion has triggered was recently updated (merged latest main), and by using both libraries no assertion failed.

[asraa]

Very weird! I suppose I will keep that mind in case something else ever comes up with GCC builds.

Thank you :) LGTM!