[fuchsia] Use SDK provided gn templates for d8

cr_fuchsia_package is deprecated in favor of using the Fuchsia
SDK provided rules directly.

This CL adds a cmx file specifically for v8_unittests. CMX
files define fuchsia components, see
https://chromium-review.googlesource.com/c/chromium/src/+/3529652
for more info.

Bug: chromium:1092804
Change-Id: Ibf1d866ec6b94a0e1a7a7c7c443a6ee80e3b1042
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3537885Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Bryant Chandler <bryantchandler@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79760}

BUILD.gn

@@ -6059,17 +6059,23 @@ group("v8_archive") {
 if (is_fuchsia && !build_with_chromium) {
   import("//build/config/fuchsia/rules.gni")
 
-  cr_fuchsia_package("d8_fuchsia_pkg") {
+  fuchsia_component("d8_fuchsia_component") {
     testonly = true
-    binary = ":d8"
-    manifest = "gni/v8.cmx"
-    package_name_override = "d8"
+    manifest = "src/d8/d8.cmx"
+    data_deps = [ ":d8" ]
+    visibility = [ ":*" ]
+  }
+
+  fuchsia_package("d8_fuchsia_pkg") {
+    testonly = true
+    package_name = "d8"
+    deps = [ ":d8_fuchsia_component" ]
   }
 
   fuchsia_package_runner("d8_fuchsia") {
     testonly = true
     package = ":d8_fuchsia_pkg"
-    package_name_override = "d8"
+    package_name = "d8"
   }
 }
 

src/d8/d8.cmx

+{
+  "include": [
+    "build/config/fuchsia/test/minimum_capabilities.test-cmx",
+    "gni/v8.cmx"
+  ],
+  "program": {
+    "binary": "d8"
+  }
+}
\ No newline at end of file