[Fleet] Prevent registry network errors during Fleet setup's bulk install operation from failing the installation of bundled packages

[joshdover]

Content written by @kpollich in #74614, copying here:

Currently, if the EPR is inaccessible, Fleet Setup will succeed with a non-fatal error and will not install a package even if it's bundled. e.g.

This should be a relatively quick fix to catch this error and allow bundled install to continue. I believe this error comes from Fleet attempting to query the Registry for the latest version here:

kibana/x-pack/plugins/fleet/server/services/epm/packages/bulk_install_packages.ts

Lines 40 to 45 in 73cc08e

	const packagesResults = await Promise.allSettled(
	packagesToInstall.map((pkg) => {
	if (typeof pkg === 'string') return Registry.fetchFindLatestPackage(pkg);
	return Promise.resolve(pkg);
	})
	);

[elasticmachine]

Pinging @elastic/fleet (Feature:EPM)

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)