[Codegen] Rewrite VectorLayoutAnalysis to a simpler implementation (#22420)

- Cleansup VectorLayoutAnalysis implementation to stop using upstream
DataFlowAnalysis framework and instead use a simple worklist to track
changes and propagate layout. This works very similar to the previous
implementation, but is much less convoluted and much smaller.
- Also fixes a bug in VectorLayoutAnalysis after the upstream
DataFlowAnalysis framework moved to ProgramPoint. ProgramPoint tracks
the Block iterator but we add operations during the propagation, which
meant all ProgramPoint's were invalidated and the analysis was working
out of pure luck. It just happened that we added almost everything to
the worklist, making it run to fixpoint eventually.

ci-extra: test_torch

Author: Groverkss

compiler/src/iree/compiler/Codegen/Common/Transforms.h

@@ -81,7 +81,7 @@ namespace IREE::VectorExt {
 class VectorLayoutInterface;
 } // namespace IREE::VectorExt
 
-/// Analyzes the root op and it's nested ops to propagate vector layouts
+/// Analyzes the root op and its nested ops to propagate vector layouts
 /// originating from to_vector operations. Example:
 ///
 ///    %root = vector.transfer_read
@@ -95,8 +95,8 @@ class VectorLayoutInterface;
 ///          |
 ///          --> %root2, %b and %e must have the same layout
 ///
-/// Here, the user provided an anchor point for %root, fixing it's layout to L.
-/// The layout then uses it's inference rules to find the layout of other
+/// Here, the user provided an anchor point for %root, fixing its layout to L.
+/// The layout then uses its inference rules to find the layout of other
 /// values:
 ///
 ///    %root = vector.transfer_read