resource virtual network dhcp_service_enabled validation isn't quite right

[chrismarget-j]

When dhcp_service_enabled is true, one or both of these must also be true:

• ipv4_connectivity_enabled
• ipv6_connectivity_enabled

This rule was attempted with the following validation:

			Validators: []validator.Bool{
				apstravalidator.WhenValueIsBool(types.BoolValue(true),
					apstravalidator.AlsoRequiresNOf(1,
						path.MatchRelative().AtParent().AtName("ipv4_connectivity_enabled"),
						path.MatchRelative().AtParent().AtName("ipv6_connectivity_enabled"),
					),
				),
			},

The problem is that apstravalidator.AlsoRequiresNOf only requires that the paths be configured (not null), rather than that they be configured with any particular value.

Setting both to false will pass validation while dhcp_service_enabled is true.

Perhaps we need a NOfValidators(n int, ...v validator) validator which calls the enumerated validators and counts how many of them run without error?

In that case we'd pass it the valueAtMustBeValidator{}