Command line argument to disable debug assertions on fuzz run

[oherrala]

There's no command line argument to disable debug assertions on a fuzz run without doing optimized build as documented in fuzz run --help:

  -a, --debug-assertions
          Build artifacts with debug assertions and overflow checks enabled (default if not -O)

Maybe add a new argument (-A?) to disable debug assertions.

Workaround is to pass it from environment via RUSTFLAGS="-C debug-assertions=false".

[fitzgen]

Not sure if clap supports it, but it would be nice if we could have a tri-state thing that supported the following

• --debug-assertions=true
• --debug-assertions=false
• --debug-assertions (alias for =true)

and this would be backwards compatible as well.