cli: Avoid extra IDL generation during verify

[acheroncrypto]

Problem

IDL is being generated twice inside the verify command:

1. During the regular build process, which also includes building the IDL:

   anchor/cli/src/lib.rs

   Line 2068 in 6fbfc40

   build(

2. Regular IDL generation:

   anchor/cli/src/lib.rs

   Line 2108 in 6fbfc40

   let local_idl = generate_idl(&cfg, true, false, &cargo_args)?;

We can avoid the first build operation by setting the no_idl argument of build to true.

Summary of changes

Avoid extra IDL generation inside the verify command.

[vercel]

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