[quality] Move `html_coverage_report` to the quality subdir

Signed-off-by: Chris Frantz <cfrantz@google.com>

BUILD.bazel

diff --git a/BUILD.bazel b/BUILD.bazel
index 02e3084..bd64654 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -2,7 +2,6 @@
 # Licensed under the Apache License, Version 2.0, see LICENSE for details.
 # SPDX-License-Identifier: Apache-2.0
 
-load("//rules:quality.bzl", "html_coverage_report")
 load("//rules:cargo.bzl", "cargo_raze")
 load("@rules_rust//rust:defs.bzl", "rust_analyzer")
 
@@ -13,10 +12,6 @@
     "python-requirements.txt",
 ])
 
-html_coverage_report(
-    name = "html_coverage_report",
-)
-
 filegroup(
     name = "cores",
     srcs = [

quality/BUILD.bazel

diff --git a/quality/BUILD.bazel b/quality/BUILD.bazel
index 5332559..213ed94 100644
--- a/quality/BUILD.bazel
+++ b/quality/BUILD.bazel
@@ -4,7 +4,7 @@
 
 load("@com_github_bazelbuild_buildtools//buildifier:def.bzl", "buildifier", "buildifier_test")
 load("@lowrisc_lint//rules:rules.bzl", "licence_test")
-load("//rules:quality.bzl", "clang_format_check", "clang_format_test")
+load("//rules:quality.bzl", "clang_format_check", "clang_format_test", "html_coverage_report")
 
 package(default_visibility = ["//visibility:public"])
 
@@ -124,3 +124,7 @@
     diff_command = "diff -u",
     mode = "diff",
 )
+
+html_coverage_report(
+    name = "html_coverage_report",
+)