Add option to run hydration tests in production mode

[nolanlawson]

(Follow-up to #3158)

We should run the hydration tests in prod mode as well. Otherwise we can't cover branching like this (in hydrateCustomElement):

lwc/packages/@lwc/engine-core/src/framework/hydration.ts

Lines 254 to 256 in 7b15494

	if (process.env.NODE_ENV !== 'production') {
	assert.isTrue(vm.state === VMState.created, `${vm} cannot be recycled.`);
	}

[git2gus]

This issue has been linked to a new work item: W-12259370