* Do not collect code coverage on test_helpers

Note:  some test helpers are no longer being used but might be some day - e.g., shallowWithIntl will be used on the beta badge

* Fix uncovered type line

- since we're not iterating over productNames, no need for it to be an array - it can be written more clearly in string union format

* Fix branch coverage on index.tsx

- Since KibanaLogic is setting `|| {}` fallbacks in any case, I've opted to remove them in this file and let fallbacks be handled there

- Fixed typing to make it clear plugins can be undefined (i.e., disabled/optional, etc) in props + reorganize w/ comments

- KibanaValues requires an Omit to override props types

* Crawler DomainsTable test coverage/improvements

- Fix test failing locally due to timezones by increasing the timezone offset

- Cover missing branch line by adding a domain with no `lastCrawl`

- Remove unnecessary extra beforeEach with dupe re-shallow/mounts

- move getTable helper to its most relevant block (it's not being used in the generic column content checks, only in the actions column suite)

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
# Conflicts:
#	x-pack/plugins/enterprise_search/public/applications/app_search/components/crawler/components/domains_table.test.tsx