Add --buildrequires/--requires options to build_module_locally

Overriding the platform stream with, e.g, platform:el8.3.1
is necessary to correctly pick up the right build dependencies for some
configurations. Match the fedpkg/rhpkg module-build way of doing this by adding
--buildrequires and --requires options to build_module_locally.

module_build_service/manage.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 # SPDX-License-Identifier: MIT
 from __future__ import absolute_import, print_function
+from collections import defaultdict
 from functools import wraps
 import getpass
 import logging
@@ -103,11 +104,33 @@ def import_module(mmd_file):
     import_mmd(db.session, mmd)
 
 
+def collect_dep_overrides(overrides):
+    collected = defaultdict(list)
+    for value in overrides:
+        parts = value.split(":")
+        if len(parts) != 2:
+            raise ValueError("dependency overrides must be in the form name:stream")
+        name, stream = parts
+        collected[name].append(stream)
+
+    return collected
+
+
 @manager.option("--stream", action="store", dest="stream")
 @manager.option("--file", action="store", dest="yaml_file")
 @manager.option("--srpm", action="append", default=[], dest="srpms", metavar="SRPM")
 @manager.option("--skiptests", action="store_true", dest="skiptests")
 @manager.option("--offline", action="store_true", dest="offline")
+@manager.option(
+    '--buildrequires', action='append', metavar='name:stream',
+    dest='buildrequires', default=[],
+    help='Buildrequires to override in the form of "name:stream"'
+)
+@manager.option(
+    '--requires', action='append', metavar='name:stream',
+    dest='requires', default=[],
+    help='Requires to override in the form of "name:stream"'
+)
 @manager.option("-d", "--debug", action="store_true", dest="log_debug")
 @manager.option("-l", "--add-local-build", action="append", default=None, dest="local_build_nsvs")
 @manager.option("-s", "--set-stream", action="append", default=[], dest="default_streams")
@@ -125,6 +148,8 @@ def build_module_locally(
     offline=False,
     platform_repofiles=None,
     platform_id=None,
+    requires=None,
+    buildrequires=None,
     log_debug=False,
 ):
     """ Performs local module build using Mock
@@ -163,7 +188,9 @@ def build_module_locally(
 
     params = {
         "local_build": True,
-        "default_streams": dict(ns.split(":") for ns in default_streams)
+        "default_streams": dict(ns.split(":") for ns in default_streams),
+        "require_overrides": collect_dep_overrides(requires),
+        "buildrequire_overrides": collect_dep_overrides(buildrequires),
     }
     if srpms:
         params["srpms"] = srpms