Enable regex search (#4566)

* Adds custom search filter to allow 'regex' searching of results

* Specify if "shell" can access database for certain commands

* Bug fix for settings API

- Do not allow cache on detail endpoints
- Was causing strange error conditions with missing or duplicate PK values

* Adds user setting to control regex search

* Enable regex for search queries

- bootstrap tables
- search preview

* Pass search options through bettererer

* Refactor API endpoints to use new filter approach

* Bump API version

* Add "whole word" search

- Closes https://github.com/inventree/InvenTree/issues/4510

* Handle case where existing fields are empty

* pop > get

InvenTree/report/api.py

@@ -10,7 +10,6 @@ from django.utils.translation import gettext_lazy as _
 from django.views.decorators.cache import cache_page, never_cache
 
 from django_filters.rest_framework import DjangoFilterBackend
-from rest_framework import filters
 from rest_framework.response import Response
 
 import build.models
@@ -19,6 +18,7 @@ import InvenTree.helpers
 import order.models
 import part.models
 from InvenTree.api import MetadataView
+from InvenTree.filters import InvenTreeSearchFilter
 from InvenTree.mixins import ListAPI, RetrieveAPI, RetrieveUpdateDestroyAPI
 from stock.models import StockItem, StockItemAttachment
 
@@ -35,7 +35,7 @@ class ReportListView(ListAPI):
 
     filter_backends = [
         DjangoFilterBackend,
-        filters.SearchFilter,
+        InvenTreeSearchFilter,
     ]
 
     filterset_fields = [