git: disable shallow clones for non-hosted gits

[zkat]

Ref: npm/npm#16898 (comment)

Gotta try relevant hosts and make sure all the hosted ones are able to do shallow clones like these. :\

[raphinesse]

Isn't this already implemented by the following lines?

pacote/lib/fetchers/git.js

Lines 165 to 174 in ccc6e90

	// Only certain whitelisted hosted gits support shadow cloning
	const SHALLOW_HOSTS = new Set(['github', 'gist', 'gitlab', 'bitbucket'])
	function cloneRepo (spec, repo, resolvedRef, rawRef, tmp, opts) {
	const ref = resolvedRef ? resolvedRef.ref : rawRef
	if (resolvedRef && spec.hosted && SHALLOW_HOSTS.has(spec.hosted.type)) {
	return git.shallow(repo, ref, tmp, opts)
	} else {
	return git.clone(repo, ref, tmp, opts)
	}
	}