Closes#5069 back-end part
And:
- do not display schemaPendingUpdates status on remote server lists as
this call will become too costly if there are dozens of servers
- (refacto) create foreignTableService
After this is merged we will be able to delete remoteTable's
availableTables column
- Fixes storybook coverage command: the coverage directory path was
incorrect, but instead of failing `storybook:test --configuration=ci`,
it was hanging indefinitely.
- Switches back to `concurrently` to launch `storybook:static` and
`storybook:test` in parallel, which allows to use options to explicitly
kill `storybook:static` when `storybook:test` fails.
- Moves `storybook:test --configuration=ci` to its own command
`storybook:static:test`: used in the CI, and can be used locally to run
storybook tests without having to launch `storybook:dev` first.
- Creates command `storybook:coverage` and enables cache for this
command.
- Fixes Jest tests that were failing.
- Improves caching conditions for some tasks (for instance, no need to
invalidate Jest test cache if only Storybook story files were modified).
