CVK_GCP_22 check fail with string gke version

[roxannelandry]

Describe the issue
This check fail when the gke version is a string (1.29.4-gke.1043004).

Examples
Error: -09 14:42:01,690 [MainThread ] [ERROR] Failed to run check CKV_GCP_22 on /modules/shared/base/gke.tf:google_container_node_pool.default-01
Traceback (most recent call last):
File "/usr/local/lib/python3.11/site-packages/checkov/common/checks/base_check.py", line 68, in run
check_result["result"] = self.scan_entity_conf(entity_configuration, entity_type)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/checkov/terraform/checks/resource/base_resource_check.py", line 43, in scan_entity_conf
return self.scan_resource_conf(conf)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/checkov/terraform/checks/resource/gcp/GKEUseCosImage.py", line 24, in scan_resource_conf
version = float(splitter[0] + "." + splitter[1])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: could not convert string to float: 'var.gke_node_version'