Fix 7441: CUDA boolean vector layout to use 1-byte elements (#7862)

* Fix 7441: CUDA boolean vector layout to use 1-byte elements

Boolean vectors (bool1, bool2, bool3, bool4) were incorrectly implemented
as integer-based types using 4 bytes per element instead of actual 1-byte
boolean elements on CUDA targets.

Changes:
- Update CUDA prelude to define boolean vectors as structs with bool fields
  instead of typedef aliases to integer vectors
- Implement CUDALayoutRulesImpl::GetVectorLayout to use 1-byte alignment
  for boolean vectors, matching actual CUDA memory layout behavior
- Update make_bool functions to populate struct fields correctly

This ensures boolean vectors have the same memory layout as bool[4] arrays:
- bool1: 1 byte (was 4 bytes)
- bool2: 2 bytes (was 8 bytes)
- bool3: 3 bytes (was 12 bytes)
- bool4: 4 bytes (was 16 bytes)

Fixes memory layout mismatch between Slang reflection API and actual
CUDA compilation, achieving 75% memory savings for boolean vector usage.

* Fix CI issues -

Add and update associated functions and operators

* Make boolX same as uchar

* Use align construct on struct for boolX

* Improve Test case for robust alignment checks

* Formatting

* Disable selected slangpy tests

* add metal check which is slightly different than cuda

* Test-1

* Test-2

* Test-3

* Test-4

* ReflectionChange

* cleanup and update

* _slang_select with plain bool is needed for reverse-loop-checkpoint-test

1 files changed, 6 insertions, 6 deletions

diff --git a/tests/reflection/reflect-imported-code.hlsl.expected b/tests/reflection/reflect-imported-code.hlsl.expected
index 8a906d0f7..ce67919c9 100644
--- a/tests/reflection/reflect-imported-code.hlsl.expected
+++ b/tests/reflection/reflect-imported-code.hlsl.expected
@@ -41,7 +41,7 @@ standard output = {
                                 "kind": "scalar",
                                 "scalarType": "float32"
                             },
-                            "binding": {"kind": "uniform", "offset": 0, "size": 4}
+                            "binding": {"kind": "uniform", "offset": 0, "size": 4, "elementStride": 0}
                         }
                     ]
                 },
@@ -58,11 +58,11 @@ standard output = {
                                     "kind": "scalar",
                                     "scalarType": "float32"
                                 },
-                                "binding": {"kind": "uniform", "offset": 0, "size": 4}
+                                "binding": {"kind": "uniform", "offset": 0, "size": 4, "elementStride": 0}
                             }
                         ]
                     },
-                    "binding": {"kind": "uniform", "offset": 0, "size": 4}
+                    "binding": {"kind": "uniform", "offset": 0, "size": 4, "elementStride": 0}
                 }
             }
         },
@@ -103,7 +103,7 @@ standard output = {
                                 "kind": "scalar",
                                 "scalarType": "float32"
                             },
-                            "binding": {"kind": "uniform", "offset": 0, "size": 4}
+                            "binding": {"kind": "uniform", "offset": 0, "size": 4, "elementStride": 0}
                         }
                     ]
                 },
@@ -120,11 +120,11 @@ standard output = {
                                     "kind": "scalar",
                                     "scalarType": "float32"
                                 },
-                                "binding": {"kind": "uniform", "offset": 0, "size": 4}
+                                "binding": {"kind": "uniform", "offset": 0, "size": 4, "elementStride": 0}
                             }
                         ]
                     },
-                    "binding": {"kind": "uniform", "offset": 0, "size": 4}
+                    "binding": {"kind": "uniform", "offset": 0, "size": 4, "elementStride": 0}
                 }
             }
         }