[TT-Train] Fix Taskflow test leakage (#17004)

### Problem description
Taskflow tests became visible in the ctest.

### What's changed
Forced taskflow to avoid building tests.

### Checklist
- [x] Post commit CI passes
- [x] Blackhole Post commit (if applicable)
- [x] Model regression CI testing passes (if applicable)
- [x] Device performance regression CI testing passes (if applicable)
- [x] **(For models and ops writers)** Full [new
models](https://github.com/tenstorrent/tt-metal/actions/workflows/full-new-models-suite.yaml)
tests passes
- [x] New/Existing tests provide coverage for changes

tt-train/cmake/dependencies.cmake

@@ -72,7 +72,7 @@ CPMAddPackage(
         "XTENSOR_ENABLE_TESTS OFF"
 )
 
-CPMAddPackage(NAME taskflow GITHUB_REPOSITORY taskflow/taskflow GIT_TAG v3.7.0)
+CPMAddPackage(NAME taskflow GITHUB_REPOSITORY taskflow/taskflow GIT_TAG v3.7.0 OPTIONS "TF_BUILD_TESTS OFF")
 
 include(${PROJECT_SOURCE_DIR}/cmake/fetch_msgpack.cmake)