Remove with_dbenv use in aiida.orm

This forces the import of `aiida.cmdline` in `aiida.orm` which doesn't
just slow down, but also is conceptually wrong. The problem of the
`with_dbenv` decorator is also that it cannot be imported inside a
method to avoid the import cost when importing `aiida.orm` but has to be
imported at the top in order to be used.

aiida/orm/utils/builders/code.py

@@ -11,7 +11,6 @@
 import enum
 import pathlib
 
-from aiida.cmdline.utils.decorators import with_dbenv
 from aiida.common.utils import ErrorAccumulator
 from aiida.common.warnings import warn_deprecation
 from aiida.orm import InstalledCode, PortableCode
@@ -41,9 +40,13 @@ def validate(self, raise_error=True):
         self._err_acc.run(self.validate_installed)
         return self._err_acc.result(raise_error=self.CodeValidationError if raise_error else False)
 
-    @with_dbenv()
     def new(self):
         """Build and return a new code instance (not stored)"""
+        from aiida.manage import get_manager
+
+        # Load the profile backend if not already the case.
+        get_manager().get_profile_storage()
+
         self.validate()
 
         # Will be used at the end to check if all keys are known (those that are not None)

aiida/orm/utils/builders/computer.py

@@ -8,7 +8,6 @@
 # For further information please visit http://www.aiida.net               #
 ###########################################################################
 """Manage computer objects with lazy loading of the db env"""
-from aiida.cmdline.utils.decorators import with_dbenv
 from aiida.common.exceptions import ValidationError
 from aiida.common.utils import ErrorAccumulator
 
@@ -62,11 +61,13 @@ def validate(self, raise_error=True):
         """Validate the computer options."""
         return self._err_acc.result(raise_error=self.ComputerValidationError if raise_error else False)
 
-    @with_dbenv()
     def new(self):
         """Build and return a new computer instance (not stored)"""
+        from aiida.manage import get_manager
         from aiida.orm import Computer
 
+        # Load the profile backend if not already the case.
+        get_manager().get_profile_storage()
         self.validate()
 
         # Will be used at the end to check if all keys are known