#0: Disable Unity builds to detect bitrot (#15017)

### Ticket
None

### Problem description
A header file missed an include and went undetected in CI because Unity
builds accidentally provided the needed include in the combined TU.

### What's changed
Disabled Unity builds for CI
Added the missing include

### Checklist
- [ ] Post commit CI passes
- [ ] Blackhole Post commit (if applicable)
- [ ] Model regression CI testing passes (if applicable)
- [ ] Device performance regression CI testing passes (if applicable)
- [ ] New/Existing tests provide coverage for changes

---------

Co-authored-by: Bryan Wilder Field Lozano <blozano@tenstorrent.com>

.github/workflows/build-artifact.yaml

@@ -137,7 +137,8 @@ jobs:
             # NOTE: may be inaccurate if we have >1 build runner on the same machine, using the same local cache
             ccache -z
 
-            build_command="./build_metal.sh --build-type ${{ inputs.build-type }} --build-all --enable-ccache"
+            # Disable Unity builds to detect any bitrot from not building each TU independently
+            build_command="./build_metal.sh --build-type ${{ inputs.build-type }} --build-all --enable-ccache --disable-unity-builds"
             echo "${{ inputs.tracy }}"
             if [ "${{ inputs.tracy }}" = "true" ]; then
               build_command="$build_command --enable-profiler"

ttnn/cpp/ttnn/operations/data_movement/concat/device/concat_program_factory.hpp

@@ -7,6 +7,7 @@
 #include "tt_metal/common/work_split.hpp"
 #include "tt_metal/detail/util.hpp"
 #include "tt_metal/host_api.hpp"
+#include "ttnn/cpp/ttnn/operation.hpp"
 
 namespace ttnn::operations::data_movement::detail {