Replace execution_requirements with the standardized field "tags".

PiperOrigin-RevId: 657777523
Change-Id: If803f20aebba7126b70bcc9c483b9d03989104bc

cc/toolchains/tool.bzl

@@ -33,7 +33,7 @@ def _cc_tool_impl(ctx):
         label = ctx.label,
         exe = exe,
         runfiles = runfiles,
-        execution_requirements = tuple(ctx.attr.execution_requirements),
+        execution_requirements = tuple(ctx.attr.tags),
     )
 
     link = ctx.actions.declare_file(ctx.label.name)
@@ -70,9 +70,6 @@ executable label.
             allow_files = True,
             doc = "Additional files that are required for this tool to run.",
         ),
-        "execution_requirements": attr.string_list(
-            doc = "A list of strings that provide hints for execution environment compatibility (e.g. `requires-network`).",
-        ),
     },
     provides = [ToolInfo],
     doc = """Declares a tool that can be bound to action configs.
@@ -87,6 +84,7 @@ cc_tool(
     executable = "@llvm_toolchain//:bin/clang",
     # Suppose clang needs libc to run.
     data = ["@llvm_toolchain//:lib/x86_64-linux-gnu/libc.so.6"]
+    tags = ["requires-network"],
 )
 ```
 """,

tests/rule_based_toolchain/tool/BUILD

@@ -1,19 +1,16 @@
-load("@rules_testing//lib:util.bzl", "util")
 load("//cc/toolchains:directory_tool.bzl", "cc_directory_tool")
 load("//cc/toolchains:tool.bzl", "cc_tool")
 load("//tests/rule_based_toolchain:analysis_test_suite.bzl", "analysis_test_suite")
 load(":tool_test.bzl", "TARGETS", "TESTS")
 
-util.helper_target(
-    cc_tool,
+cc_tool(
     name = "tool",
     src = "//tests/rule_based_toolchain/testdata:bin_wrapper.sh",
     data = ["//tests/rule_based_toolchain/testdata:bin"],
-    execution_requirements = ["requires-network"],
+    tags = ["requires-network"],
 )
 
-util.helper_target(
-    cc_tool,
+cc_tool(
     name = "wrapped_tool",
     src = "//tests/rule_based_toolchain/testdata:bin_wrapper",
     visibility = ["//tests/rule_based_toolchain:__subpackages__"],
@@ -24,7 +21,7 @@ cc_directory_tool(
     data = ["bin"],
     directory = "//tests/rule_based_toolchain/testdata:directory",
     executable = "bin_wrapper.sh",
-    execution_requirements = ["requires-network"],
+    tags = ["requires-network"],
 )
 
 analysis_test_suite(