feat: modify error handling in case of attribute error for db calls (#4427)

* feat: modify error handling in case of attribute error for db calls

* ci: auto fixes from pre-commit.com hooks.

for more information, see https://pre-commit.ci

* chore: adding changelog file 4427.added.md [dependabot-skip]

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: pyansys-ci-bot <92810346+pyansys-ci-bot@users.noreply.github.com>
Co-authored-by: German <28149841+germa89@users.noreply.github.com>

Author: 4 people

doc/changelog.d/4427.added.md

@@ -0,0 +1 @@
+Modify error handling in case of attribute error for db calls

src/ansys/mapdl/core/mapdl_inprocess.py

@@ -81,6 +81,12 @@ def input(
     def exit(self) -> None:
         self._in_process_backend.exit()
 
+    @property
+    def db(self):
+        raise AttributeError(
+            f"{type(self).__name__!s} doesn't support the 'db' backend, check documentation for alternatives."
+        )
+
     @MapdlBase.name.getter
     def name(self) -> str:
         return "MapdlInProcess"