feat: add access to webclient and webclientBuilder

Created by: UnleashSpirit

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We recently swith from resttemplate to webclient. We have self signed certificate so we need to allow them for http call. This is achieved by setting the clientConnector with a HttpClient and his SslContext but we need to have access to the WebClient.Builder to do that, also adding filter (custom headers)

That's the purpose of this PR, use the work already done with default ObjectMapper and DateFormat to avoid having to do it and get access to webClient or webClientBuilder.

It also fix: #8602 (closed)