Misc optimizations

[alcuadrado]

Sixth PR of the compilation times optimization effort.

This PR introduces multiple smaller optimizations:

• I created an fs-util module to replace slower dependencies with it (e.g. glob)
• Stopped using loadash whenever possible, and only load its necessary modules when we still use it.
• Use execFile instead of exec to run the compiler, as exec spawns a new shell (!!!!!!)
• Don't import hardhat/console.sol in the sample project as it's slow to compile.
• Some hardhat load time optimizations — Mostly requiring things when needed instead of at the top of the file
• Cache the solidity files resolution results — We were reading each file multiple times (!)
• We were reading some files just to check for their existence (!)

WIP: Parts of this require tests.

Depends on #3052

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Name	Status	Preview	Updated
hardhat	✅ Ready (Inspect)	Visit Preview	Aug 30, 2022 at 0:55AM (UTC)
hardhat-storybook	✅ Ready (Inspect)	Visit Preview	Aug 30, 2022 at 0:55AM (UTC)

[github-actions]

This issue is also being tracked on Linear.

We use Linear to manage our development process, but we keep the conversations on Github.

LINEAR-ID: c89d90fa-1b26-46d6-9b84-f77b0d70ea5e

[alcuadrado]

Finally ready! This should have been a few prs.

Handling different filesystems at the same time is so painful!

[fvictorio]

Minor comment; pre-approving.