Ensure that PCT is installed and licenesed before checking if a pool is open. (#245)

Author: sameagen-MW

.github/workflows/build_and_test_full.yml

@@ -5,7 +5,7 @@ on:
     push:
       branches: 
         - main
-        - mbt-plugin
+        - pct-unavailable-fix
 env:
   MLM_LICENSE_TOKEN: ${{ secrets.MLM_LICENSE_TOKEN }}
 jobs:

instrumentation/buildtool/+matlab/+buildtool/+plugins/OpenTelemetryPlugin.m

@@ -9,10 +9,12 @@ function runBuild(plugin, pluginData)
             % 
             % Imperfect detection of parallel builds but
             % the impact of a false positive is very low
-            p = gcp("nocreate");
-            if ~isempty(p)
-                warning("opentelemetry:buildtool:OpenTelemetryPlugin:NoParallelEmit", ...
-                    "Tasks executed on parallel workers do not emit telemetry data.");
+            if matlab.internal.parallel.isPCTInstalled && matlab.internal.parallel.isPCTLicensed
+                p = gcp("nocreate");
+                if ~isempty(p)
+                    warning("opentelemetry:buildtool:OpenTelemetryPlugin:NoParallelEmit", ...
+                        "Tasks executed on parallel workers do not emit telemetry data.");
+                end
             end
 
             % Configure by attaching to span if passed in via environment