[smanders]

Summary

Update externpro submodule to 26.02.4

Changes

• Migrated externpro submodule .devcontainer -> .externpro
• Updated .externpro to externpro 26.02.4
• Previous HEAD: c634276f7d0da765a81f8abcce433ea5546d64f6
• New HEAD: f88ab7811ad9fe6057f0c20a2ced4184a81abc35
• Updated caller workflows to match templates
• Synced cmake presets (see report below)
• Updated .github/release-tag.json (tag: xpv21.09.06.6)
  • Optional: add the "release:tag" label to trigger tagging, release builds, and draft release notes
• If you add the "release:tag" label, the tag will be `xpv21.09.06.6`

Workflow Update Report

• 🔧 xpbuild.yml: preserved dropped job jobs.macos
• 🔧 xpbuild.yml: preserved dropped job jobs.windows
• 🔧 xpbuild.yml: preserved repo key jobs.linux.with.arch_list
• 🔧 xpbuild.yml: preserved repo key jobs.linux.with.artifact_pattern
• 🔧 xpbuild.yml: preserved repo key jobs.linux.with.buildpro_images
• 🔧 xpbuild.yml: preserved repo key jobs.linux.with.cmake_workflow_preset_suffix
• ✓ xpbuild.yml: Synced from template
• 🔧 xprelease.yml: preserved repo key jobs.release-from-build.with.artifact_pattern
• ✓ xprelease.yml: Synced from template
• ✓ xptag.yml: Synced from template

CMake presets

presets: CMakePresets.json: matched template (post-normalization), symlink -> .externpro/cmake/presets/xpPresets.json staged
presets: CMakePresetsBase.json -> xpPresetsBase.json (renamed, content verbatim)

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