Split preference store (#46843)

* Split preference store

* Chore: Add tests to pref

* Fix preference in wire

* Rename and adjust

* Add pref service test

* Rename methods, add tests

* Rename Preferences to Preference, names IDs correctly

* Fix lint

* Refactor Save

* Refactor upsert
Add new logic for QueryHistory
Rename some fields according to go naming conventions
Refactore tests

* Roll back ID that breaks tests

* Rename Id to ID in UpdatePreferenceQuery

* Use preference as a model to modify store

* Move pref store fakes to pref test file

* Add integration tag for store tests

* Adjust test

Co-authored-by: yangkb09 <yangkb09@gmail.com>

pkg/services/preference/preftest/fake.go

@@ -0,0 +1,32 @@
+package preftest
+
+import (
+	"context"
+
+	pref "github.com/grafana/grafana/pkg/services/preference"
+)
+
+type FakePreferenceService struct {
+	ExpectedPreference *pref.Preference
+	ExpectedError      error
+}
+
+func NewPreferenceServiceFake() *FakePreferenceService {
+	return &FakePreferenceService{}
+}
+
+func (f *FakePreferenceService) GetWithDefaults(ctx context.Context, query *pref.GetPreferenceWithDefaultsQuery) (*pref.Preference, error) {
+	return f.ExpectedPreference, f.ExpectedError
+}
+
+func (f *FakePreferenceService) Get(ctx context.Context, query *pref.GetPreferenceQuery) (*pref.Preference, error) {
+	return f.ExpectedPreference, f.ExpectedError
+}
+
+func (f *FakePreferenceService) Save(ctx context.Context, cmd *pref.SavePreferenceCommand) error {
+	return f.ExpectedError
+}
+
+func (f *FakePreferenceService) GetDefaults() *pref.Preference {
+	return f.ExpectedPreference
+}