Add the possibility to use multiple FQDN

[grimlokason]

Description of Change

This change add the possibility to use multiple FQDN for the UI and the docker registries

This is done by adding a new array ( hostMulti ) for each docker repo and ingress with all the FQDN needed.

The add of a new array instead of using the original var is here to avoid breaking conf that are actually working and don't need that function.

NB : we are on traefik and it worked, we don't have nginx as an ingress.

Best regards.

Things to Do Before Submitting

• Have you signed the Sonatype CLA?
  Yes under the name Youenn Gestin

• Have you added and run automated tests for your change?
  (See the README)
  I'm sorry, i'm not accostumated to that.
  I've runned it but not added some since i don't know how to automatically validate the change.

### Chart [ nexus-repository-manager ] .

 PASS  deployment       tests/deployment_test.yaml
2022/04/29 11:10:38 warning: destination for ingressClassName is a table. Ignoring non-table value nginx
 PASS  ingress  tests/ingress_test.yaml

Charts:      1 passed, 1 total
Test Suites: 2 passed, 2 total
Tests:       6 passed, 6 total
Snapshot:    0 passed, 0 total
Time:        27.099625ms

• Have you run helm lint on your change?
  yes, the lint is ok :

==> Linting .

1 chart(s) linted, 0 chart(s) failed

( NB : i'll be away from 30th april to 9th may )