Improve GitHub Action failure reporting annotation (#821)

[GitHub parses console output for special
phrases](https://stackoverflow.com/a/71091060) to better format it's
output. By doing this when we report errors, we can more clearly
communicate errors:

Compare
[before](https://github.com/JackPGreen/rel-scripts/actions/runs/11711717220):

![image](https://github.com/user-attachments/assets/7191f6ed-6b94-4575-a23b-96dc65b7043d)

Against
[after](https://github.com/JackPGreen/rel-scripts/actions/runs/11711863956):

![image](https://github.com/user-attachments/assets/1276308c-4c9f-4f4c-9fa0-2df666b17685)

.github/scripts/abstract-simple-smoke-test.sh

@@ -83,5 +83,5 @@ function install_clc() {
 
 # Prints the given message to stderr
 function echoerr() {
-  echo "ERROR - $*" 1>&2;
+  echo "::error::ERROR - $*" 1>&2;
 }