Query builder (#10104)

* add query builder to facilitate dynamic SQL construction

* leverage query builder to refactor user store

This is partially setup work for MM-13120, but merged to master to avoid
further conflicts.

* fix unrelated unit test breakage

* documentation tweaks

* Apply suggestions from code review

Co-Authored-By: lieut-data <jesse.hallam@gmail.com>

* prefer comma separated case options to fallthrough

* vendor github.com/Masterminds/squirrel and deps

* switch to using github.com/Masterminds/squirrel

* rm querybuilder

app/channel_test.go

@@ -5,6 +5,7 @@ package app
 
 import (
 	"fmt"
+	"sort"
 	"strings"
 	"testing"
 
@@ -305,6 +306,9 @@ func TestCreateGroupChannelCreatesChannelMemberHistoryRecord(t *testing.T) {
 			assert.Equal(t, channel.Id, history.ChannelId)
 			channelMemberHistoryUserIds = append(channelMemberHistoryUserIds, history.UserId)
 		}
+
+		sort.Strings(groupUserIds)
+		sort.Strings(channelMemberHistoryUserIds)
 		assert.Equal(t, groupUserIds, channelMemberHistoryUserIds)
 	}
 }