[Matrix][SYCL] Add explicit conversion in wi_element when it is necessary (#5279)

Previously, there was a potential issue of deduced conflicting types because we didn't take integral promotion into consideration
Now, we add explicit conversion where integral promotion might happen to avoid such issues to appear.

Author: yubingex007-a11y

sycl/include/sycl/ext/oneapi/matrix/matrix-jit.hpp

@@ -287,7 +287,8 @@ class wi_element {
   wi_element &operator+=(const T &rhs) {
 #ifdef __SYCL_DEVICE_ONLY__
     M.spvm = __spirv_VectorInsertDynamic(
-        M.spvm, __spirv_VectorExtractDynamic(M.spvm, idx) + rhs, idx);
+        M.spvm, static_cast<T>(__spirv_VectorExtractDynamic(M.spvm, idx) + rhs),
+        idx);
     return *this;
 #else
     (void)rhs;
@@ -311,7 +312,8 @@ class wi_element {
   wi_element &operator-=(const T &rhs) {
 #ifdef __SYCL_DEVICE_ONLY__
     M.spvm = __spirv_VectorInsertDynamic(
-        M.spvm, __spirv_VectorExtractDynamic(M.spvm, idx) - rhs, idx);
+        M.spvm, static_cast<T>(__spirv_VectorExtractDynamic(M.spvm, idx) - rhs),
+        idx);
     return *this;
 #else
     (void)rhs;
@@ -335,7 +337,8 @@ class wi_element {
   wi_element &operator*=(const T &rhs) {
 #ifdef __SYCL_DEVICE_ONLY__
     M.spvm = __spirv_VectorInsertDynamic(
-        M.spvm, __spirv_VectorExtractDynamic(M.spvm, idx) * rhs, idx);
+        M.spvm, static_cast<T>(__spirv_VectorExtractDynamic(M.spvm, idx) * rhs),
+        idx);
     return *this;
 #else
     (void)rhs;
@@ -359,7 +362,8 @@ class wi_element {
   wi_element &operator/=(const T &rhs) {
 #ifdef __SYCL_DEVICE_ONLY__
     M.spvm = __spirv_VectorInsertDynamic(
-        M.spvm, __spirv_VectorExtractDynamic(M.spvm, idx) / rhs, idx);
+        M.spvm, static_cast<T>(__spirv_VectorExtractDynamic(M.spvm, idx) / rhs),
+        idx);
     return *this;
 #else
     (void)rhs;