Iterate over chains when getting all Safes by owner

[iamacook]

Description

When calling getAllSafesByOwner, we expect the response from the Config Service to not be longer than one page. As a temporary fix (as this also affected the clients), we increased the page size o Chains. This is, however, not the correct way to paginated. We should, instead iterate of the pages if a next value is present.

Requirements

1. Call getChains and determine if there is a next value, calling that thereafter and concatenating the results.
2. Else return concatenated results.

Additional information

We should consider whether we do this on the chains repository level in case getChains is called anywhere without a limit, etc.

After this we should consider reverting the page size of chains (if we have that many configurations saved).