feat(npm): add `install_args` option

[amittamari]

(Rework of #1580)

Often, when I'm working, my npm registry is set to the work's registry, which sometimes causes npm installations in Mason to fail.

To overcome this, I added the option to provide install_args to npm, the same as available in pip, so I can configure Mason to always use the default npm registry.

Note: I wasn't sure if I should also support it in lua/mason-core/managers/npm/init.lua, because I could not find any references where it is used (except tests). Let me know, and I can add it if needed.

[amittamari]

Resolved conflicts

[amittamari]

@williamboman can you please give this one a review? 🙏🏻 It's a relatively small change