Update Khepri, add Horus dependency

This commit updates Khepri to the 0.7.0 tag commit and adds Horus as
a dependency using the following commands to regenerate the bazel build
files:

    bazel run gazelle -- update-repos \
      --verbose \
      --build_files_dir=bazel \
      github.com/rabbitmq/horus@d9061b945a3a3261f639fbd7e7fcd0624fa2e9ad
    bazel run gazelle -- update-repos \
      --verbose \
      --build_files_dir=bazel \
      github.com/rabbitmq/khepri@e5b8753ef14212baaa53af8171ad71b3848003d4

Plus some manual tuning for the Khepri build file.

Author: the-mikedavis

MODULE.bazel

@@ -225,6 +225,13 @@ erlang_package.hex_package(
     version = "1.3.3",
 )
 
+erlang_package.git_package(
+    name = "horus",
+    build_file = "@rabbitmq-server//bazel:BUILD.horus",
+    commit = "d9061b945a3a3261f639fbd7e7fcd0624fa2e9ad",
+    repository = "rabbitmq/horus",
+)
+
 erlang_package.git_package(
     name = "jose",
     build_file = "@rabbitmq-server//bazel:BUILD.jose",
@@ -242,7 +249,7 @@ erlang_package.hex_package(
 erlang_package.git_package(
     name = "khepri",
     build_file = "@rabbitmq-server//bazel:BUILD.khepri",
-    commit = "295bf1e91a20e5260ee3df9fdb8423b16c1d518a",
+    commit = "e5b8753ef14212baaa53af8171ad71b3848003d4",
     repository = "rabbitmq/khepri",
 )
 

bazel/BUILD.horus

@@ -0,0 +1,114 @@
+load("@rules_erlang//:erlang_bytecode2.bzl", "erlang_bytecode", "erlc_opts")
+load("@rules_erlang//:erlang_app.bzl", "erlang_app")
+
+erlc_opts(
+    name = "erlc_opts",
+    values = select({
+        "@rules_erlang//:debug_build": [
+            "+debug_info",
+            "+warn_export_vars",
+            "+warnings_as_errors",
+        ],
+        "//conditions:default": [
+            "+debug_info",
+            "+deterministic",
+            "+warn_export_vars",
+            "+warnings_as_errors",
+        ],
+    }),
+    visibility = [":__subpackages__"],
+)
+
+erlang_bytecode(
+    name = "other_beam",
+    srcs = [
+        "src/horus.erl",
+        "src/horus_cover.erl",
+        "src/horus_utils.erl",
+    ],
+    hdrs = [":public_and_private_hdrs"],
+    app_name = "horus",
+    dest = "ebin",
+    erlc_opts = "//:erlc_opts",
+)
+
+filegroup(
+    name = "beam_files",
+    srcs = [":other_beam"],
+)
+
+filegroup(
+    name = "srcs",
+    srcs = [
+        "src/horus.app.src",
+        "src/horus.erl",
+        "src/horus_cover.erl",
+        "src/horus_utils.erl",
+    ],
+)
+
+filegroup(
+    name = "private_hdrs",
+    srcs = [
+        "src/horus_error.hrl",
+        "src/horus_fun.hrl",
+    ],
+)
+
+filegroup(
+    name = "public_hdrs",
+    srcs = [
+        "include/horus.hrl",
+    ],
+)
+
+filegroup(
+    name = "priv",
+    srcs = [
+        "priv/horus_cover_helper.erl",
+    ],
+)
+
+filegroup(
+    name = "license_files",
+    srcs = [
+        "LICENSE-Apache-2.0",
+        "LICENSE-MPL-2.0",
+    ],
+)
+
+filegroup(
+    name = "public_and_private_hdrs",
+    srcs = [
+        ":private_hdrs",
+        ":public_hdrs",
+    ],
+)
+
+filegroup(
+    name = "all_srcs",
+    srcs = [
+        ":public_and_private_hdrs",
+        ":srcs",
+    ],
+)
+
+erlang_app(
+    name = "erlang_app",
+    srcs = [":all_srcs"],
+    hdrs = [":public_hdrs"],
+    app_name = "horus",
+    beam_files = [":beam_files"],
+    extra_apps = [
+        "compiler",
+        "tools",
+    ],
+    license_files = [":license_files"],
+    priv = [":priv"],
+)
+
+alias(
+    name = "horus",
+    actual = ":erlang_app",
+    visibility = ["//visibility:public"],
+)