[fuzzing] execute every exported function

[lum1n0us]

after #3984

[yamt]

for a similar fuzzier (https://github.com/yamt/toywasm/tree/master/examples/fuzz)
i ended up with having a small limit for the number of functions to execute
because a module can have a ton of exported functions.
i'm not sure if the same concern applies to this fuzzier. just FYI.

[lum1n0us]

i ended up with having a small limit for the number of functions to execute because a module can have a ton of exported functions.

May I ask the negative consequences of executing too many functions?

[yamt]

i ended up with having a small limit for the number of functions to execute because a module can have a ton of exported functions.

May I ask the negative consequences of executing too many functions?

it takes very long. practically ~forever.