##### 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`.
hostname: '{{ vcenter_hostname }}'
    username: '{{ vcenter_username }}'
    password: '{{ vcenter_password }}'
    esxi_hostname: '{{ esxi_hostname }}'
    options:
        'Config.HostAgent.log.level': 'verbose'
  delegate_to: localhost
- name: Manage multiple settings for an ESXi host
  vmware_host_config_manager:
    hostname: '{{ vcenter_hostname }}'
    username: '{{ vcenter_username }}'
    password: '{{ vcenter_password }}'
    esxi_hostname: '{{ esxi_hostname }}'
    options:
        'Config.HostAgent.log.level': 'verbose'
        'Annotations.WelcomeMessage': 'Hello World'
        'Config.HostAgent.plugins.solo.enableMob': false
  delegate_to: localhost
'''
RETURN = r'''#
'''
try:
    from pyVmomi import vim, vmodl, VmomiSupport
except ImportError:
    pass
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.vmware import vmware_argument_spec, PyVmomi
from ansible.module_utils._text import to_native
from ansible.module_utils.six import integer_types, string_types
class VmwareConfigManager(PyVmomi):