wgsl: Replace [[decoration]] with @decoration

Deprecate the old syntax. Migrate everything to the new syntax.

Bug: tint:1382
Change-Id: Ide12b2e927b17dc93b9714c7049090864cc568d3
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/77260
Reviewed-by: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: David Neto <dneto@google.com>

test/ptr_ref/load/local/i32.spvasm.expected.wgsl

@@ -6,7 +6,7 @@ fn main_1() {
   return;
 }
 
-[[stage(compute), workgroup_size(1, 1, 1)]]
+@stage(compute) @workgroup_size(1, 1, 1)
 fn main() {
   main_1();
 }

test/ptr_ref/load/local/i32.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   var i : i32 = 123;
   let use : i32 = i + 1;

test/ptr_ref/load/local/i32.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   var i : i32 = 123;
   let use : i32 = (i + 1);

test/ptr_ref/load/local/ptr_function.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   var i : i32 = 123;
   let p : ptr<function, i32> = &i;

test/ptr_ref/load/local/ptr_function.wgsl.expected.wgsl

@@ -1,4 +1,4 @@
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   var i : i32 = 123;
   let p : ptr<function, i32> = &(i);

test/ptr_ref/load/local/ptr_private.wgsl

@@ -1,6 +1,6 @@
 var<private> i : i32 = 123;
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   let p : ptr<private, i32> = &i;
   let use : i32 = *p + 1;

test/ptr_ref/load/local/ptr_private.wgsl.expected.wgsl

@@ -1,6 +1,6 @@
 var<private> i : i32 = 123;
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   let p : ptr<private, i32> = &(i);
   let use : i32 = (*(p) + 1);

test/ptr_ref/load/local/ptr_storage.wgsl

@@ -2,10 +2,10 @@ struct S {
   a : i32;
 };
 
-[[group(0), binding(0)]]
+@group(0) @binding(0)
 var<storage, read_write> v : S;
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   let p : ptr<storage, i32, read_write> = &v.a;
   let use : i32 = *p + 1;

test/ptr_ref/load/local/ptr_storage.wgsl.expected.wgsl

@@ -2,9 +2,9 @@ struct S {
   a : i32;
 }
 
-[[group(0), binding(0)]] var<storage, read_write> v : S;
+@group(0) @binding(0) var<storage, read_write> v : S;
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   let p : ptr<storage, i32, read_write> = &(v.a);
   let use : i32 = (*(p) + 1);

test/ptr_ref/load/local/ptr_uniform.wgsl

@@ -2,10 +2,10 @@ struct S {
   a : i32;
 };
 
-[[group(0), binding(0)]]
+@group(0) @binding(0)
 var<uniform> v : S;
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   let p : ptr<uniform, i32> = &v.a;
   let use : i32 = *p + 1;

test/ptr_ref/load/local/ptr_uniform.wgsl.expected.wgsl

@@ -2,9 +2,9 @@ struct S {
   a : i32;
 }
 
-[[group(0), binding(0)]] var<uniform> v : S;
+@group(0) @binding(0) var<uniform> v : S;
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   let p : ptr<uniform, i32> = &(v.a);
   let use : i32 = (*(p) + 1);

test/ptr_ref/load/local/ptr_workgroup.wgsl

@@ -1,6 +1,6 @@
 var<workgroup> i : i32;
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   i = 123;
   let p : ptr<workgroup, i32> = &i;

test/ptr_ref/load/local/ptr_workgroup.wgsl.expected.wgsl

@@ -1,6 +1,6 @@
 var<workgroup> i : i32;
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   i = 123;
   let p : ptr<workgroup, i32> = &(i);

test/ptr_ref/load/local/struct_field.spvasm.expected.wgsl

@@ -10,7 +10,7 @@ fn main_1() {
   return;
 }
 
-[[stage(compute), workgroup_size(1, 1, 1)]]
+@stage(compute) @workgroup_size(1, 1, 1)
 fn main() {
   main_1();
 }

test/ptr_ref/load/local/struct_field.wgsl

@@ -2,7 +2,7 @@ struct S {
   i : i32;
 };
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   var V : S;
   var i : i32 = V.i;

test/ptr_ref/load/local/struct_field.wgsl.expected.wgsl

@@ -2,7 +2,7 @@ struct S {
   i : i32;
 }
 
-[[stage(compute), workgroup_size(1)]]
+@stage(compute) @workgroup_size(1)
 fn main() {
   var V : S;
   var i : i32 = V.i;