Add ORCID branding to Log in with ORCID button

[sheilarabun]

The button for logging in with ORCID currently is not ORCID-branded. Using the ORCID branded button consistently helps ensure that researchers recognize they are being asked to securely provide their ORCID iD. This is also required to meet ORCID's certification requirements for repositories: https://info.orcid.org/vendors-and-service-providers/csp-criteria-repository-systems/

Requirements for ORCID-branded button can be found at https://info.orcid.org/documentation/integration-guide/orcid-oauth-sign-in-guidelines/#h-button-and-link-styling