ci: Drop LCG 104 job (DD4hep too old for current ODD) (#3512)

Drop LCG 104. LCG 106 ships with Boost 1.85.0 which has a known UB issue (boostorg/container#273) that causes the vertexing to fail.

.gitlab-ci.yml

@@ -373,19 +373,6 @@ linux_ubuntu_2204_clang:
     - ctest --test-dir build -j$(nproc)
 
 
-lcg_104:
-  <<: *lcg_base_job
-
-  variables:
-    LCG_VERSION: "104"
-
-  parallel:
-    matrix:
-      - OS: [alma9]
-        COMPILER:
-          - gcc13
-          - clang16
-
 lcg_105:
   <<: *lcg_base_job
 

CMakeLists.txt

@@ -277,6 +277,17 @@ if(ACTS_SETUP_BOOST)
             "Found Boost ${Boost_VERSION} - recommended is at least ${_acts_boost_recommended_version}"
         )
     endif()
+
+    if(Boost_VERSION VERSION_EQUAL "1.85.0")
+        set(message
+            "Boost 1.85.0 is known to be broken (https://github.com/boostorg/container/issues/273). Please use a different version."
+        )
+        if(ACTS_IGNORE_BOOST_1850_ERROR)
+            message(WARNING ${message})
+        else()
+            message(SEND_ERROR ${message})
+        endif()
+    endif()
 endif()
 
 if(ACTS_SETUP_EIGEN3)

Plugins/Podio/include/Acts/Plugins/Podio/PodioUtil.hpp

@@ -19,7 +19,8 @@
 
 #include <podio/podioVersion.h>
 
-#if podio_VERSION_MAJOR >= 1
+#if podio_VERSION_MAJOR >= 1 || \
+    (podio_VERSION_MAJOR == 0 && podio_VERSION_MINOR == 99)
 #include <podio/ROOTReader.h>
 #include <podio/ROOTWriter.h>
 #else
@@ -41,7 +42,8 @@ namespace PodioUtil {
 // We want to support podio 0.16 and 1.x for now
 
 // See https://github.com/AIDASoft/podio/pull/549
-#if podio_VERSION_MAJOR >= 1
+#if podio_VERSION_MAJOR >= 1 || \
+    (podio_VERSION_MAJOR == 0 && podio_VERSION_MINOR == 99)
 using ROOTWriter = podio::ROOTWriter;
 using ROOTReader = podio::ROOTReader;
 #else