FEATURE REQUEST: Support artifact attestation from Github on the public dashboard to show that WASMs built from code on Github is verfied

Basically support artifact attestation on the “Canister Upgrade” proposal type to show a “Verified” badge on the IC Dashboard if the Github attestation check passes for a particular submitted WASM to an SNS and then link back to the commit on Github whose build output on Github Actions led to this

More details here: