benchy: The default value of --api-version does not work properly

[0x5459]

Description

Running benchy in debug mode and without the --api-version argument will panic.

cargo run --bin=benchy -- window-post --size=2KiB

error:

thread 'main' panicked at 'Argument 'api_version' is required and can't have a default value' ...

.required(true) and .default_value("some value") are conflicting in clap, if required is set to true, default value will not work properly.
https://github.com/clap-rs/clap/blob/406bfbd3dc472baf402f1f16cd58b5bc7d11fac4/src/build/debug_asserts.rs#L613-#L619

Where to begin

Remove .required(true).

rust-fil-proofs/fil-proofs-tooling/src/bin/benchy/main.rs

Lines 85 to 90 in 075a545

	Arg::new("api_version")
	.long("api-version")
	.required(true)
	.help("The api_version to use (default: 1.1.0)")
	.default_value("1.1.0")
	.takes_value(true),

rust-fil-proofs/fil-proofs-tooling/src/bin/benchy/main.rs

Lines 109 to 114 in 075a545

	Arg::new("api_version")
	.long("api-version")
	.required(true)
	.help("The api_version to use (default: 1.1.0)")
	.default_value("1.1.0")
	.takes_value(true),

rust-fil-proofs/fil-proofs-tooling/src/bin/benchy/main.rs

Lines 133 to 138 in 075a545

	Arg::new("api_version")
	.long("api-version")
	.required(true)
	.help("The api_version to use (default: 1.1.0)")
	.default_value("1.1.0")
	.takes_value(true),

rust-fil-proofs/fil-proofs-tooling/src/bin/update_tree_r_cache/main.rs

Lines 319 to 324 in 075a545

	Arg::new("size")
	.required(true)
	.long("size")
	.default_value("34359738368")
	.help("The data size in bytes")
	.takes_value(true),

rust-fil-proofs/fil-proofs-tooling/src/bin/update_tree_r_cache/main.rs

Lines 344 to 349 in 075a545

	Arg::new("size")
	.required(true)
	.long("size")
	.default_value("34359738368")
	.help("The data size in bytes")
	.takes_value(true),

rust-fil-proofs/fil-proofs-tooling/src/bin/update_tree_r_cache/main.rs

Lines 369 to 374 in 075a545

	Arg::new("size")
	.required(true)
	.long("size")
	.default_value("34359738368")
	.help("The data size in bytes")
	.takes_value(true),

Can i fix it? thanks.