Update Sentry SDK to v8

[mydea]

Lighthouse has a dependency on @sentry/node v6.x. The current version is v8.

This can lead to cases where users that use Sentry themselves (in a more current version) can get peer dependency conflicts from the lighthouse package. This is not necessarily a fault of lighthouse, but a package resolution issue often, but it does happen.

By updating the Sentry SDK to v8, we should be able to "fix" this problem - in v8, the Sentry client is kept versioned on the global carrier, which should lead to the SDK not bleeding into other places.

[G-Rath]

Note that v6 @sentry/node is now pulling in a vulnerable version of cookie: GHSA-pxg6-pf52-xh8x

Updating to at least v7 would allow this to be resolved

[luixo]

Do I get it right that Sentry is an optional error reporter?

I guess it should be put into optionalDependencies then or excluded completely (while nudging users to install it)?