Change error name to avoid hiffy conflict

The name `SprotError` is already used in hubris. This is technically
fine but is causing some conflicts with our other tooling. Change the
name to avoid conflicts.

attest-data/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "attest-data"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 
 [dependencies]

attest-data/src/messages.rs

@@ -82,13 +82,13 @@ pub enum HostToRotError {
     /// Unexpected command returned
     UnexpectedCommand,
     /// Error return from the sprot command
-    SprotError(SprotError),
+    SprotError(RecvSprotError),
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Deserialize, Serialize)]
 #[repr(u32)]
 // Errors returned from the hubris side. This is _so many_
-pub enum SprotError {
+pub enum RecvSprotError {
     // protocol
     /// CRC check failed.
     ProtocolInvalidCrc,
@@ -164,8 +164,8 @@ pub enum RotToHost {
     RotTqSign,
 }
 
-impl From<SprotError> for RotToHost {
-    fn from(e: SprotError) -> Self {
+impl From<RecvSprotError> for RotToHost {
+    fn from(e: RecvSprotError) -> Self {
         RotToHost::HostToRotError(HostToRotError::SprotError(e))
     }
 }