fix model converter not found on conv3d tests

Signed-off-by: Ryan O'Shea <[email protected]>
Change-Id: Ibce8fdf18a8e3fb2f16a9f5cb0c07d167ba2514c

Author: ArmRyan

backends/arm/test/ops/test_conv3d.py

@@ -584,6 +584,7 @@ def test_convolution_3d_vgf_INT(test_data):
     pipeline.run()
 
 
+@common.SkipIfNoModelConverter
 def test_convolution_3d_vgf_FP_multi_op():
     """Ensure mixed Conv3d/Conv2d graphs keep correct spatial annotations."""
     model = Conv3dMultiOp()
@@ -597,6 +598,7 @@ def test_convolution_3d_vgf_FP_multi_op():
     pipeline.run()
 
 
+@common.SkipIfNoModelConverter
 def test_convolution_3d_vgf_INT_multi_op():
     """Ensure mixed Conv3d/Conv2d graphs keep correct spatial annotations."""
     model = Conv3dMultiOp()