gitlab_group - name value with "," succeeds on plan but fails on apply

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Bug Report

When declaring a gitlab_group resource with a faulty name the tf plan succeeds but the tf apply fails with the follwoing error:

name=>["can contain only letters, digits, emoji, '_', '.', dash, space, parenthesis. It must start with letter, digit, emoji or '_'."

The expected behavior is that the tf plan (also) fails if the name attribute is not correct.

Relevant Terraform Configuration

resource "gitlab_group" "gitlab_group_example" {
  name = " Gitlab Group Example, Issue Example"
  path = "gitlab-group-example"
}

The starting with a space and having a , in the name is not allowed

Relevant Terraform Command

Output of tf plan (abbreviated for readability):

Terraform will perform the following actions:

  # gitlab_group.gitlab_group_example will be created
  + resource "gitlab_group" "gitlab_group_example" {
	
		...................
		
      + name                               = " Gitlab Group Example, Issue Example"
      + parent_id                          = (known after apply)
      + path                               = "gitlab-group-example"
      + permanently_remove_on_delete       = false

		...................

    }

Plan: 1 to add, 0 to change, 0 to destroy.

The name attribute clearly has an illegal value but plan succeeds

Output of tf apply:

gitlab_group.gitlab_group_example: Creating...
╷
│ Error: POST https://gitlab.com/api/v4/groups: 400 {message: Failed to save group {:name=>["can contain only letters, digits, emoji, '_', '.', dash, space, parenthesis. It must start with letter, digit, emoji or '_'."]}}
│ 
│   with gitlab_group.gitlab_group_example,
│   on main.tf line 88, in resource "gitlab_group" "gitlab_group_example":
│   88: resource "gitlab_group" "gitlab_group_example" {
│ 
╵

Additional Details

• GitLab Terraform Provider Version: `18.4.1`
• Terraform Version: `1.13.4`
• License Tier: Premium

Implementation Guide

• Ensure you have set up your local development environment as described in CONTRIBUTING.md and you have cloned the community fork of the provider.
• Add a ValidateFunc to gitlab_group.name ensuring it matches a regular expression as described in the error message above (can contain only letters, digits, emoji, '', '.', dash, space, parenthesis. It must start with letter, digit, emoji or '').
• Add an integration test to https://gitlab.com/gitlab-org/terraform-provider-gitlab/-/blob/main/internal/provider/sdk/resource_gitlab_group_test.go to check the validation rejects invalid names.