##### SUMMARY
Move some helper functions from `vmware_host_config_manager` to `PyVmomi`.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
vmware_host_config_manager
vmware

##### ADDITIONAL INFORMATION
`vmware_host_config_manager` has some helper functions (`is_integer`, `is_boolean` and `is_truthy`) to deal with vSphere Web Services API `OptionValue`s. Today, I started to work on issue #61421 and I think these helper functions could be useful there, too. Actually, there are several Managed Object Types with an `OptionValue[]` parameter. Instead of duplicating the code, I think it would be better to move these helper functions to `PyVmomi` in `module_utils/vmware.py`.
"""
        Get datacenter managed object by name
        Args:
            datacenter_name: Name of datacenter
        Returns: datacenter managed object if found else None
        """
        return find_datacenter_by_name(self.content, datacenter_name=datacenter_name)
    def is_datastore_valid(self, datastore_obj=None):
        """
        Check if datastore selected is valid or not
        Args:
            datastore_obj: datastore managed object
        Returns: True if datastore is valid, False if not
        """
        if not datastore_obj \
           or datastore_obj.summary.maintenanceMode != 'normal' \
           or not datastore_obj.summary.accessible:
            return False
        return True
    def find_datastore_by_name(self, datastore_name):
        """
        Get datastore managed object by name
        Args:
            datastore_name: Name of datastore
        Returns: datastore managed object if found else None
        """
        return find_datastore_by_name(self.content, datastore_name=datastore_name)
    
    def find_datastore_cluster_by_name(self, datastore_cluster_name):