Add http_content func to serve variables from HTTP @ preseed (#10801)

This imports hashicorp/packer-plugin-sdk#43

* code generate things
* update docs
* update guides
* update examples

We want to add a new guide.

builder/cloudstack/builder.go

@@ -60,12 +60,7 @@ func (b *Builder) Run(ctx context.Context, ui packersdk.Ui, hook packersdk.Hook)
 	// Build the steps.
 	steps := []multistep.Step{
 		&stepPrepareConfig{},
-		&commonsteps.StepHTTPServer{
-			HTTPDir:     b.config.HTTPDir,
-			HTTPPortMin: b.config.HTTPPortMin,
-			HTTPPortMax: b.config.HTTPPortMax,
-			HTTPAddress: b.config.HTTPAddress,
-		},
+		commonsteps.HTTPServerFromHTTPConfig(&b.config.HTTPConfig),
 		&stepKeypair{
 			Debug:        b.config.PackerDebug,
 			Comm:         &b.config.Comm,

website/content/docs/builders/cloudstack.mdx

@@ -89,25 +89,10 @@ builder.
 - `expunge` (boolean) - Set to `true` to expunge the instance when it is
   destroyed. Defaults to `false`.
 
-- `http_directory` (string) - Path to a directory to serve using an HTTP
-  server. The files in this directory will be available over HTTP that will
-  be requestable from the virtual machine. This is useful for hosting
-  kickstart files and so on. By default this is "", which means no HTTP
-  server will be started. The address and port of the HTTP server will be
-  available as variables in `user_data`. This is covered in more detail
-  below.
-
 - `http_get_only` (boolean) - Some cloud providers only allow HTTP GET calls
   to their CloudStack API. If using such a provider, you need to set this to
   `true` in order for the provider to only make GET calls and no POST calls.
 
-- `http_port_min` and `http_port_max` (number) - These are the minimum and
-  maximum port to use for the HTTP server started to serve the
-  `http_directory`. Because Packer often runs in parallel, Packer will choose
-  a randomly available port in this range to run the HTTP server. If you want
-  to force the HTTP server to be on one port, make this minimum and maximum
-  port the same. By default the values are 8000 and 9000, respectively.
-
 - `hypervisor` (string) - The target hypervisor (e.g. `XenServer`, `KVM`) for
   the new template. This option is required when using `source_iso`.