ci: add a script to copy cdk api files to adev (#61081)

Refactors the update-cli-help script into a generic script to copy json
assets, and uses the shared code to also copy the CDK apis

PR Close #61081

adev/src/content/cdk/_build-info.json

@@ -0,0 +1,4 @@
+{
+  "branchName": "refs/heads/main",
+  "sha": "9500b84652d34db69e545a1b24b2728ea86f0328"
+}

adev/src/content/cli/BUILD.bazel

@@ -9,6 +9,6 @@ filegroup(
         ],
     ) + [
         "//adev/src/content/cli/help",
-        "//adev/src/content/cli/help:build-info.json",
+        "//adev/src/content/cli/help:_build-info.json",
     ],
 )

adev/src/content/cli/help/BUILD.bazel

@@ -2,16 +2,15 @@ load("//adev/shared-docs/pipeline/api-gen/rendering:render_api_to_html.bzl", "re
 
 package(default_visibility = ["//visibility:public"])
 
-exports_files(["build-info.json"])
+exports_files(["_build-info.json"])
 
 filegroup(
     name = "help",
     srcs = glob(
-        ["*"],
+        ["*.json"],
         exclude = [
-            # Exlucde build-info.json as it is not a help entry.
-            "build-info.json",
-            "BUILD.bazel",
+            # Exlucde _build-info.json as it is not a help entry.
+            "_*.json",
         ],
     ),
 )