[DOC] Add documentation for Do Not Fail on Forbidden Feature

[derek-ho]

What do you want to do?
Create documentation surrounding the do not fail on forbidden configuration/feature

• Request a change to existing documentation
• Add new documentation
• Report a technical problem with the documentation
• Other

Tell us about your request. Provide a summary of the request and all versions that are affected.
May have been introduced in Version 1.0 - @cwperks

What other resources are available? Provide links to related issues, POCs, steps for testing, etc.
https://github.com/opensearch-project/security/blob/0338cdd4ab701e6dfdbaaf49765300b1d6190aa0/src/test/resources/config_dnfof.yml#L4

[cwillum]

@derek-ho Hi, can you elaborate on what this issue is about and possibly provide resources (RFC, Meta-issue, etc.) that describe it? Is this issue intended to be attached to the 2.10 release? Thanks!

[derek-ho]

@cwillum quick ask around reveals it was probably introduced with the creation of the security plugin / 1.0 / ODFE. Not urgent for 2.10, but we will want to add it as introduced in 1.0 in the documentation. I may get bandwidth to work on it later, but not now - will assign myself if I have time to pick it up CC @cwperks

[cwillum]

@derek-ho Sounds good. Thanks for providing context and putting the issue into perspective.

[hdhalter]

@derek-ho - Can you please open a PR for this update? Thanks.