Add legacy SAML configuration for uaa-ci

[strehle]

Should replace
https://github.com/cloudfoundry/uaa-ci/blob/main/concourse/uaa-acceptance-gcp/tasks/push-oidc10/manifest-oidc10.yml#L18

This example can be used to show SAML setup but should serve for CI

[strehle]

@duanemay can you check if Ok for you ?

This PR should
a) ensure that we have SAML setup with dots in origin and invalid metadata, but it should start
b) remove dependency in our CI , means move away from https://raw.githubusercontent.com/cf-identity/test-oidc-1.0/master/saml-providers.yml towards a yaml inside uaa github

[duanemay]

looks fine