PuppeteerHelper: use localhost (#3073)

#### Rationale
My changes in LabKey/limsModules#2260 make it so
insecure requests to non-loopback hosts are refused for by the puppeteer
service. This PR updates the PuppeteerHelper to use localhost so the API
requests don't get denied.

#### Related Pull Requests
- LabKey/limsModules#2260
- #3073

#### Changes
- PuppeteerHelper: use localhost

#### Tasks 📍
- [x] Claude Code Review
- [x] TeamCity verification

Author: labkey-alan

src/org/labkey/test/util/puppeteer/PuppeteerHelper.java

@@ -20,7 +20,6 @@
 import org.labkey.remoteapi.SimplePostCommand;
 import org.labkey.remoteapi.puppeteer.PuppeteerSettings;
 import org.labkey.remoteapi.puppeteer.PuppeteerStatus;
-import org.labkey.test.WebTestHelper;
 
 import java.io.IOException;
 
@@ -37,7 +36,9 @@ public static void enableRemoteService(Connection connection) throws IOException
 
     public static String getRemoteServiceURL()
     {
-        return WebTestHelper.getTargetServer() + ":3031";
+        // Note: We are explicitly using localhost here instead of WebTestHelper.getTargetServer() because on TC it will
+        // use the hostname of the server, which is running Puppeteer with http, so API requests to it will be rejected.
+        return "http://localhost:3031";
     }
 
     public static PuppeteerStatus getStatus(Connection connection) throws IOException, CommandException