Remove use of deprecated datetime.utcnow()

To fix warnings below:
```
<python-input-1>:1: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
```

src/bonsai/bonsai/bim/export_ifc.py

@@ -72,9 +72,7 @@ class IfcExporter:
 
     def set_header(self):
         self.file.header.file_name.name = os.path.basename(self.ifc_export_settings.output_file)
-        self.file.header.file_name.time_stamp = (
-            datetime.datetime.utcnow().replace(tzinfo=datetime.UTC).astimezone().replace(microsecond=0).isoformat()
-        )
+        self.file.header.file_name.time_stamp = datetime.datetime.now().astimezone().replace(microsecond=0).isoformat()
         self.file.header.file_name.preprocessor_version = "IfcOpenShell {}".format(ifcopenshell.version)
         self.file.header.file_name.originating_system = "{} {}".format(
             self.get_application_name(), tool.Blender.get_bonsai_version()

src/ifcopenshell-python/ifcopenshell/api/project/create_file.py

@@ -53,9 +53,7 @@ def create_file(version: ifcopenshell.util.schema.IFC_SCHEMA = "IFC4") -> ifcope
     """
     file = ifcopenshell.file(schema=version)
     file.header.file_name.name = "/dev/null"  # Hehehe
-    file.header.file_name.time_stamp = (
-        datetime.datetime.utcnow().replace(tzinfo=datetime.timezone.utc).astimezone().replace(microsecond=0).isoformat()
-    )
+    file.header.file_name.time_stamp = datetime.datetime.now().astimezone().replace(microsecond=0).isoformat()
     file.header.file_name.preprocessor_version = "IfcOpenShell {}".format(ifcopenshell.version)
     file.header.file_name.originating_system = "IfcOpenShell {}".format(ifcopenshell.version)
     file.header.file_name.authorization = "Nobody"

src/ifcpatch/ifcpatch/recipes/PurgeData.py

@@ -57,13 +57,7 @@ class Patcher:
 
     def patch(self):
         self.file.header.file_name.name = "Rabbit"
-        self.file.header.file_name.time_stamp = (
-            datetime.datetime.utcnow()
-            .replace(tzinfo=datetime.timezone.utc)
-            .astimezone()
-            .replace(microsecond=0)
-            .isoformat()
-        )
+        self.file.header.file_name.time_stamp = datetime.datetime.now().astimezone().replace(microsecond=0).isoformat()
         self.file.header.file_name.preprocessor_version = "Rabbit"
         self.file.header.file_name.originating_system = "Rabbit"
 

src/opencdeserver/api/app/security/secure.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import os
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 
 from database.neo4j import db
 from fastapi import Depends, HTTPException, Security, status
@@ -33,10 +33,8 @@ credentials_exception = HTTPException(
 
 def create_access_token(data: dict, expires_delta: timedelta | None = None):
     payload = data.copy()
-    if expires_delta:
-        expire = datetime.utcnow() + expires_delta
-    else:
-        expire = datetime.utcnow() + timedelta(minutes=15)
+    expires_delta = expires_delta or timedelta(minutes=15)
+    expire = datetime.now(timezone.utc) + expires_delta
     payload.update({"expires": str(expire)})
     encoded_jwt = jwt.encode(payload, secrets["security_secret_key"], algorithm=os.environ["SECURITY_ALGORITHM"])
     return encoded_jwt