[Bug] the validation of the transform name is incorrect

[daverick]

Describe the bug
The provider does not accept transform with a name that contains dots . like sli-generic-log.delay and this is not a limitation coming from Elasticsearch.

│ Error: invalid value for name (must contain only lower case alphanumeric characters, hyphens, and underscores)
...  with elasticstack_elasticsearch_transform.sli_generic_log_frequency,
on transforms-ops.tf line 2, in resource "elasticstack_elasticsearch_transform" "sli_generic_log_frequency":
 2:   name = "sli-generic-log.frequency"

Expected behavior
transform name with a dot should be accepted

Versions (please complete the following information):

• Provider version 0.11.11
• Elasticsearch Version 8.15

Additional context
Looks like only this validation rule need to be changed.

(I am in an air gapped environment this why I was not able to copy paste directly the config or the exact output producing this bug)