Allow hostfactory to create tokens with a CIDR subnet

[rpothier]

Desired Outcome

Hostfactory should allow a subnet on the cidrs

Implemented Changes

The Golang Cobra CLI checks to verify the IP address, but this
is too restrictive as we want to allow an IP address with no subnet and also an IP address with a subnet.
If there is no subnet supplied by the user, it defaults to /32.

Removed the use of IPSliceP() and changed to just a plain string.
The CLI will no longer validate the IP address.

Connected Issue/Story

CyberArk internal issue ID: [ONYX-33513]

Definition of Done

At least 1 todo must be completed in the sections below for the PR to be
merged.

Changelog

• The CHANGELOG has been updated, or
• This PR does not include user-facing changes and doesn't require a
  CHANGELOG update

Test coverage

• This PR includes new unit and integration tests to go with the code
  changes, or
• The changes in this PR do not require tests

Documentation

• Docs (e.g. READMEs) were updated in this PR
• A follow-up issue to update official docs has been filed here: [insert issue ID]
• This PR does not require updating any documentation

Behavior

• This PR changes product behavior and has been reviewed by a PO, or
• These changes are part of a larger initiative that will be reviewed later, or
• No behavior was changed with this PR

Security

• Security architect has reviewed the changes in this PR,
• These changes are part of a larger initiative with a separate security review, or
• There are no security aspects to these changes

[codeclimate]

Code Climate has analyzed commit 8e28875 and detected 1 issue on this pull request.

Here's the issue category breakdown:

Category	Count
Style	1

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 80.8% (0.0% change).

View more on Code Climate.

[szh]

LGTM