Currently we use Github action's inputs as inputs to cifuzz.
This means we need to do an extra step to convert each input into
an env var so our scripts can actually use it.
This is pretty bug prone and unnecessary, we should probably
get rid of this abstraction and switch to encouraging devs to set
the env vars directly.
Adds functionality to check if a crash exists in the most recent OSS-Fuzz build. This is necessary to determine if a crash was introduced in the current pull request or existed in the project already. Crashes that are surfaced to the user will be both reproducible and novel to the OSS-Fuzz project.