feat: Update snapshot labels (#900)

* Use the 'beta' and 'preview' instead of 'trunk' and 'stable' to identify the package version, following SemVer guidelines.

* Version info is defined in the snapshot label
No need to increase the number to resolve the precedence.

Issue: 201475

Author: anaiberta

.github/workflows/Build.yml

@@ -80,16 +80,14 @@ jobs:
           master)
             echo "## Is MASTER branch"
 
-            versionChangelist="-stable.$timestamp-SNAPSHOT"
+            versionChangelist="-preview.$timestamp-SNAPSHOT"
             SHOULD_DEPLOY='true'
             ;;
 
           beta)
-            echo "## Is BETA branch, add +100 to major number"
+            echo "## Is BETA branch"
 
-            pomMajorNumber=$(expr $pomMajorNumber + 100)
-            
-            versionChangelist="-trunk.$timestamp-SNAPSHOT"
+            versionChangelist="-beta.$timestamp-SNAPSHOT"
             SHOULD_DEPLOY='true'
             ;;