More specifically define openmetrics data

test_build.sh:
Add different types of metrics (info, gauge, summary).

test_build.sh

@@ -14,7 +14,13 @@ for _extension in {efi,gz,iso,lkrn,pxe,qcow2,xz,zst}; do
 done
 
 {
-  printf '# TYPE version info\n'
-  printf 'version_info{package="foo", description="Version of foo", version="1.0.0"} 1\n'
-  printf 'version_info{package="bar", description="Version of bar", version="1.1.0"} 1\n'
+  printf '# TYPE version_info info\n'
+  printf 'version_info{name="foo",description="Version of foo",version="1.0.0"} 1\n'
+  printf 'version_info{name="bar",description="Version of bar",version="1.1.0"} 1\n'
+  printf '# TYPE artifact_mebibytes gauge\n'
+  printf 'artifact_mebibytes{name="foo",description="Size of foo"} 500\n'
+  printf 'artifact_mebibytes{name="bar",description="Size of bar"} 1000\n'
+  printf '# TYPE package_count summary\n'
+  printf 'data_count{name="foo",description="Amount of foo"} 100\n'
+  printf 'data_count{name="bar",description="Amount of bar"} 200\n'
 } > output/metrics.txt