Remove the Release 1 pipeline files; point everything at Release 2

new_docker_build.sh and rpmbuild/make_rpm_ubuntu26.py (Release 1
validation-scope driver/producer) did not belong to this branch; their
functional callers are adapted to the Release 2 files:

- rpmbuild/make_rpm_ubuntu26_release2.py: PIPELINE_FILES now packages
  new_docker_build_release2.sh and make_rpm_ubuntu26_release2.py.
- jenkins-ci-rme/jenkins_builder_ubuntu26.sh: runs
  make_rpm_ubuntu26_release2.py with -DBUILD_RTI=ON and the Release 2
  target list (--build_targets; a full-tree build is not possible on
  this tree); staging tar also excludes ./build4*.
- jenkins-ci-rme/release-16-10-2026.sh (local dry run): calls
  new_docker_build_release2.sh; derives the pipeline root from the tree
  layout and exports MIGRATE_PIPELINE_ROOT; uses the prebuilt image when
  present, otherwise the driver installs deps in-container (the R1
  --build-prebuilt-image option does not exist in the R2 driver).
- jenkins-ci-rme/jenkins/Jenkinsfile: coverage stage runs the R2 driver
  with MIGRATE_PIPELINE_ROOT exported (wins over the checked-in .envrc,
  which carries a host-specific path).
- Doc/comment updates: Dockerfile header, install_arcgis.sh, publisher,
  Jenkinsfile descriptions, jenkins-ci-rme/README.md, README.md.

Remaining references to the old names are only in historical migration
reports, which are left as-is.

qt6-after/qt6-migrated-legatus/new_docker_build_release2.sh

@@ -9,7 +9,8 @@ set -euo pipefail
 # - AP4: DDS middleware (Core, DDSConnector, Routing, QosProfile, RTI layer)
 # - AP9: Tools and translations (DdsView, LogViewer, SqlBrowser, generators, lupdate)
 #
-# This script is derived from new_docker_build.sh but focused on Release 2 targets only.
+# This is the Release 2 scope driver (the full-tree driver of the earlier
+# validation scope has been removed from this branch).
 # -----------------------------------------------------------------------------
 
 usage() {
@@ -35,7 +36,7 @@ Prebuilt Docker image usage:
 
 Package production options (DEB):
   --run-jenkins-builder    Build the release DEB packages inside the container
-                           using the in-tree rpmbuild/make_rpm_ubuntu26.py
+                           using the in-tree rpmbuild/make_rpm_ubuntu26_release2.py
   --package-output-dir DIR Directory to mount for package output (default: ./packages-out)
   --lts-version VERSION    LTS version for package (default: 1.0)
   --project NAME           Project name for package (default: guez)