Provide a api for List resource types

[kiranchavala]

The required feature described as a wish

As a User/Admin/Operator I would like to know the resource types that are present in cloudstack

Currently, the listResourceDetails and listDetailOptions API requires the resource type parameter

https://cloudstack.apache.org/api/apidocs-4.22/apis/listResourceDetails.html
https://cloudstack.apache.org/api/apidocs-4.22/apis/listDetailOptions.html

Also If a User/Admin/Operator needs to add a detail to resource id they need the resource type parameter

https://cloudstack.apache.org/api/apidocs-4.22/apis/addResourceDetail.html

Currently there is no list of resourcetypes that present in present either is docs

It will be beneficial to the users if we can have a API call which can list the resourcetype in cloudstack

cloudstack/api/src/main/java/com/cloud/server/ResourceTag.java

Lines 30 to 74 in a5b6bc3

	public enum ResourceObjectType {
	UserVm(true, true, true),
	Template(true, true, true),
	VnfTemplate(false, false, true),
	ISO(true, false, true),
	Volume(true, true),
	Snapshot(true, false),
	Backup(true, false),
	Network(true, true, true),
	DomainRouter(false, false),
	Nic(false, true),
	LoadBalancer(true, true),
	PortForwardingRule(true, true),
	FirewallRule(true, true),
	SecurityGroup(true, false),
	SecurityGroupRule(true, false),
	PublicIpAddress(true, true),
	Project(true, false, true),
	Account(true, false, true),
	Vpc(true, true, true),
	NetworkACL(true, true),
	StaticRoute(true, false),
	VMSnapshot(true, false),
	RemoteAccessVpn(true, true),
	Zone(false, true, true),
	ServiceOffering(false, true),
	Storage(false, true),
	PrivateGateway(false, true),
	NetworkACLList(false, true),
	VpnGateway(false, true),
	CustomerGateway(false, true),
	VpnConnection(false, true),
	User(true, true, true),
	DiskOffering(false, true),
	AutoScaleVmProfile(false, true),
	AutoScaleVmGroup(false, true),
	LBStickinessPolicy(false, true),
	LBHealthCheckPolicy(false, true),
	SnapshotPolicy(true, true),
	GuestOsCategory(false, false, true),
	GuestOs(false, true),
	NetworkOffering(false, true),
	VpcOffering(true, false),
	Domain(true, false, true),
	ObjectStore(false, false, true);