Fix GROUP5 for release build: Viewer not in release scope

- Change BUILD_GROUP5 default from ON to OFF for release builds
- GROUP5 contains Viewer modules (situationMapCommon, etc.) which are
  NOT in the release scope M = {TetraIF, Z, Lts/Common}
- Z components are in GROUP3, which uses RELEASE_GROUP3_TARGETS
- Update documentation to reflect correct group assignments

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/new_docker_build.sh

@@ -115,9 +115,9 @@ Defaults:
   BUILD_CODIFICATION=OFF
   BUILD_GROUP1=OFF           Release: OFF (ddscore in Lts/Services)
   BUILD_GROUP2=OFF           Release: OFF (migration_tests)
-  BUILD_GROUP3=ON            Release: ON (TetraIF)
+  BUILD_GROUP3=ON            Release: ON (Z components, TetraIF)
   BUILD_GROUP4=OFF
-  BUILD_GROUP5=ON            Release: ON (Z)
+  BUILD_GROUP5=OFF           Release: OFF (Viewer - not in scope)
   BUILD_GROUP6=OFF
   BUILD_GROUP7=OFF
   BUILD_GROUP8=OFF
@@ -699,12 +699,13 @@ BUILD_RTI="${BUILD_RTI:-OFF}"
 BUILD_GRANTLEE="${BUILD_GRANTLEE:-ON}"
 BUILD_ARCGIS="${BUILD_ARCGIS:-OFF}"
 BUILD_CODIFICATION="${BUILD_CODIFICATION:-OFF}"
-# For release: only GROUP3 (TetraIF), GROUP5 (Z), GROUP11 (Lts/Common)
+# For release: only GROUP3 (Z/TetraIF), GROUP11 (Lts/Common)
+# Note: GROUP5 is Viewer (not in release scope), Z components are in GROUP3
 BUILD_GROUP1="${BUILD_GROUP1:-OFF}"
 BUILD_GROUP2="${BUILD_GROUP2:-OFF}"
 BUILD_GROUP3="${BUILD_GROUP3:-ON}"
 BUILD_GROUP4="${BUILD_GROUP4:-OFF}"
-BUILD_GROUP5="${BUILD_GROUP5:-ON}"
+BUILD_GROUP5="${BUILD_GROUP5:-OFF}"
 BUILD_GROUP6="${BUILD_GROUP6:-OFF}"
 BUILD_GROUP7="${BUILD_GROUP7:-OFF}"
 BUILD_GROUP8="${BUILD_GROUP8:-OFF}"