HHH-19341 Adjust the snapshots publishing config to use username/password env variables

Author: marko-bekhta

local-build-plugins/src/main/groovy/local.publishing.gradle

@@ -70,6 +70,9 @@ publishingExtension.repositories {
     maven {
         name = 'snapshots'
         url = "https://oss.sonatype.org/content/repositories/snapshots/"
+        // So that Gradle uses the `ORG_GRADLE_PROJECT_snapshotsPassword` / `ORG_GRADLE_PROJECT_snapshotsUsername`
+        //  env variables to read the username/password for the `snapshots` repository publishing:
+        credentials(PasswordCredentials)
     }
 }