Error in CompositeFusion (auto optimize)

The introduction of the new [MapFusion](https://github.com/spcl/dace/pull/1629) implementation revealed some bugs (most likely in `CompositeFusion`). Since the new transformation has a compatibility mode, it must be disabled first, see patch bellow.

The error surfaces in `tests/npbench/polybench/correlation_test.py` and the main cause is most likely the usage of a dynamic memlet. If the update was changed to `stdev = np.where(stddev <= 0.1, 1.0, stddev)` then the error goes away.

After map fusion has run the SDFG has the following structure (where `x` is `stddev`).
The reason is, that now the before-after dependency is not given through an explicit or rather direct data flow, but through the dependency of the maps, which the transformation fails to pick up.

```
From 213c36d5ba337bfc1541941b0bc459f94270dcf5 Mon Sep 17 00:00:00 2001
From: Philip Mueller
Date: Fri, 6 Sep 2024 14:54:20 +0200
Subject: [PATCH] Disable strict dataflow in auto optimizer.

---
dace/transformation/auto/auto_optimize.py | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/dace/transformation/auto/auto_optimize.py b/dace/transformation/auto/auto_optimize.py
index 09ff481e3..db0ba5ef2 100644
--- a/dace/transformation/auto/auto_optimize.py
+++ b/dace/transformation/auto/auto_optimize.py
@@ -52,6 +52,9 @@ def greedy_fuse(graph_or_subgraph: GraphViewType,
:param permutations_only: Disallow splitting of maps during MultiExpansion stage
:param expand_reductions: Expand all reduce nodes before fusion
"""
+ validate_all = True
+ validate = True
+ strict_dataflow = True
debugprint = config.Config.get_bool('debugprint')
if isinstance(graph_or_subgraph, ControlFlowRegion):
if isinstance(graph_or_subgraph, SDFG):
@@ -61,7 +64,7 @@ def greedy_fuse(graph_or_subgraph: GraphViewType,
# We have to use `strict_dataflow` because it is known that `CompositeFusion`
# has problems otherwise.
graph_or_subgraph.apply_transformations_repeated(
- MapFusion(strict_dataflow=True),
+ MapFusion(strict_dataflow=strict_dataflow),
validate_all=validate_all,
)

@@ -82,7 +85,7 @@ def greedy_fuse(graph_or_subgraph: GraphViewType,
if isinstance(graph_or_subgraph, SDFGState):
sdfg = graph_or_subgraph.parent
sdfg.apply_transformations_repeated(
- MapFusion(strict_dataflow=True),
+ MapFusion(strict_dataflow=strict_dataflow),
validate_all=validate_all,
)
graph = graph_or_subgraph
--
2.46.0
```