fix: recognize --resolve flag in validate command (#5853)

* fix: recognize `--resolve` flag in `validate` command

Prior to this change the flag was implemented but not considered as a valid one.

* docs: re-generate docs

core/src/commands/validate.ts

@@ -47,6 +47,8 @@ export class ValidateCommand extends Command<{}, Opts> {
         garden validate --resolve                    # fully resolve all actions
   `
 
+  override options = validateOpts
+
   override printHeader({ log }) {
     printHeader(log, "Validate", "✔️")
   }

docs/reference/commands.md

@@ -5880,8 +5880,13 @@ Examples:
 
 #### Usage
 
-    garden validate 
+    garden validate [options]
 
+#### Options
+
+| Argument | Alias | Type | Description |
+| -------- | ----- | ---- | ----------- |
+  | `--resolve` |  | array:string | Fully resolve a specific action, including references to runtime outputs from other actions. Actions should be specified as `<kind>.<name>` (e.g. `deploy.my-service` or `build.my-image`). This option can be specified multiple times to fully resolve multiple actions. Use * to fully resolve all actions. Note that this may result in actions being executed during validation (e.g. if a runtime output is referenced by another action, it will be executed in order to fully resolve the config). In such cases, we recommend not using this option.
 
 
 ### garden version