Refactor F16->F32 VCVT microkernels

Use pre-initialized parameters structure for constant literals

PiperOrigin-RevId: 418884656
diff --git a/BUILD.bazel b/BUILD.bazel
index 1d48ba6..aa647df 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -131,7 +131,7 @@
 ]
 
 PROD_SCALAR_AARCH32_MICROKERNEL_SRCS = [
-    "src/f16-f32-vcvt/gen/vcvt-scalar-float-x4.c",
+    "src/f16-f32-vcvt/gen/vcvt-scalar-x4.c",
     "src/f32-argmaxpool/4x-scalar-c1.c",
     "src/f32-argmaxpool/9p8x-scalar-c1.c",
     "src/f32-argmaxpool/9x-scalar-c1.c",
@@ -274,7 +274,7 @@
 ]
 
 PROD_SCALAR_WASM_MICROKERNEL_SRCS = [
-    "src/f16-f32-vcvt/gen/vcvt-scalar-float-x1.c",
+    "src/f16-f32-vcvt/gen/vcvt-scalar-x1.c",
     "src/f32-argmaxpool/4x-scalar-c1.c",
     "src/f32-argmaxpool/9p8x-scalar-c1.c",
     "src/f32-argmaxpool/9x-scalar-c1.c",
@@ -419,10 +419,10 @@
 ]
 
 ALL_SCALAR_MICROKERNEL_SRCS = [
-    "src/f16-f32-vcvt/gen/vcvt-scalar-float-x1.c",
-    "src/f16-f32-vcvt/gen/vcvt-scalar-float-x2.c",
-    "src/f16-f32-vcvt/gen/vcvt-scalar-float-x3.c",
-    "src/f16-f32-vcvt/gen/vcvt-scalar-float-x4.c",
+    "src/f16-f32-vcvt/gen/vcvt-scalar-x1.c",
+    "src/f16-f32-vcvt/gen/vcvt-scalar-x2.c",
+    "src/f16-f32-vcvt/gen/vcvt-scalar-x3.c",
+    "src/f16-f32-vcvt/gen/vcvt-scalar-x4.c",
     "src/f32-argmaxpool/4x-scalar-c1.c",
     "src/f32-argmaxpool/9p8x-scalar-c1.c",
     "src/f32-argmaxpool/9x-scalar-c1.c",