Validate requirements format in hassfest (#55094)

Co-authored-by: Joakim Sørensen <joasoe@gmail.com>

script/hassfest/__main__.py

@@ -24,18 +24,19 @@ from . import (
 from .model import Config, Integration
 
 INTEGRATION_PLUGINS = [
-    json,
     codeowners,
     config_flow,
     dependencies,
+    dhcp,
+    json,
     manifest,
     mqtt,
+    requirements,
     services,
     ssdp,
     translations,
-    zeroconf,
-    dhcp,
     usb,
+    zeroconf,
 ]
 HASS_PLUGINS = [
     coverage,
@@ -103,9 +104,6 @@ def main():
 
     plugins = [*INTEGRATION_PLUGINS]
 
-    if config.requirements:
-        plugins.append(requirements)
-
     if config.specific_integrations:
         integrations = {}
 
@@ -122,7 +120,11 @@ def main():
         try:
             start = monotonic()
             print(f"Validating {plugin.__name__.split('.')[-1]}...", end="", flush=True)
-            if plugin is requirements and not config.specific_integrations:
+            if (
+                plugin is requirements
+                and config.requirements
+                and not config.specific_integrations
+            ):
                 print()
             plugin.validate(integrations, config)
             print(f" done in {monotonic() - start:.2f}s")