feat: cli: add support for supplying ephemeral parameters at workspace creation (#26012)

Resolves the issue of `--prompt-ephemeral-parameters` and
`--ephemeral-parameter` not being available for use in the `coder
create` workspace creation command (they are only available in `coder
start` command). Back when they were [added
originally](https://github.com/coder/coder/pull/15030) it seems to have
been an oversight that they were left out.

The problem this solves:

```
coder create --parameter my_ephemeral_parameter=foo
error: prepare build: ephemeral parameter "my_ephemeral_parameter" can be used only with --prompt-ephemeral-parameters or --ephemeral-parameter flag
```

```
coder create my-test-ws -t general --ephemeral-parameter my_ephemeral_parameter=foo
parsing flags ([create my-test-ws -t general --ephemeral-parameter my_ephemeral_parameter=foo]) for "coder create": unknown flag: --ephemeral-parameter
```

Tested on a template with the following:

```
data "coder_parameter" "my_ephemeral_parameter" {
  name         = "my_ephemeral_parameter"
  type         = "bool"
  description  = "true or false?"
  mutable      = true
  default      = false
  ephemeral    = true
}

resource "coder_env" "debug_ephemeral" {
  agent_id = coder_agent.main.id
  name     = "EPHEMERAL_TEST"
  value    = data.coder_parameter.my_ephemeral_parameter.value
}
```

By running:

```
➜  coder git:(rowan/coder-create-5495) ✗ go run cmd/coder/main.go create --ephemeral-parameter my_ephemeral_parameter=true
> Specify a name for your workspace: ws4
Select a template below to preview the provisioned infrastructure:
?  kasmvnc-ubuntu-coder-dev used by 1 active developer
Select a preset below:
?  Small (2 CPU / 4 GB)
....
...
The ws4 workspace has been created at Jun  3 12:36:38!

➜  coder git:(rowan/coder-create-5495) ✗ coder ssh ws4               
workspace-ws4-5d6994756f-qlwnl% echo $EPHEMERAL_TEST
true
workspace-ws4-5d6994756f-qlwnl% exit
```

cli/testdata/coder_create_--help.golden

@@ -13,13 +13,29 @@ OPTIONS:
   -O, --org string, $CODER_ORGANIZATION
           Select which organization (uuid or name) to use.
 
+      --always-prompt bool
+          Always prompt all parameters. Does not pull parameter values from
+          existing workspace.
+
       --automatic-updates string, $CODER_WORKSPACE_AUTOMATIC_UPDATES (default: never)
           Specify automatic updates setting for the workspace (accepts 'always'
           or 'never').
 
+      --build-option string-array, $CODER_BUILD_OPTION
+          Build option value in the format "name=value".
+          DEPRECATED: Use --ephemeral-parameter instead.
+
+      --build-options bool
+          Prompt for one-time build options defined with ephemeral parameters.
+          DEPRECATED: Use --prompt-ephemeral-parameters instead.
+
       --copy-parameters-from string, $CODER_WORKSPACE_COPY_PARAMETERS_FROM
           Specify the source workspace name to copy parameters from.
 
+      --ephemeral-parameter string-array, $CODER_EPHEMERAL_PARAMETER
+          Set the value of ephemeral parameters defined in the template. The
+          format is "name=value".
+
       --no-wait bool, $CODER_CREATE_NO_WAIT
           Return immediately after creating the workspace. The build will run in
           the background.
@@ -34,6 +50,11 @@ OPTIONS:
           Specify the name of a template version preset. Use 'none' to
           explicitly indicate that no preset should be used.
 
+      --prompt-ephemeral-parameters bool, $CODER_PROMPT_EPHEMERAL_PARAMETERS
+          Prompt to set values of ephemeral parameters defined in the template.
+          If a value has been set via --ephemeral-parameter, it will not be
+          prompted for.
+
       --rich-parameter-file string, $CODER_RICH_PARAMETER_FILE
           Specify a file path with values for rich parameters defined in the
           template. The file should be in YAML format, containing key-value