Return stateproof info with goal account partkeyinfo

[algonautshant]

Return state proof information with 'goal account partkeyinfo'

See cmd/goal/account.go

				// PKI TODO: enable with state proof support.
				//fmt.Printf("State proof key:           %s\n", base64.StdEncoding.EncodeToString(part.StateProofKey))
				//fmt.Printf("State proof ID:            %s\n", base64.StdEncoding.EncodeToString(stateProofID))

For reference:
#3164

Blocked by #3183 and #3105