feat: allow connections without certificates

[LeoSpyke]

SUMMARY

Gives the ability to specify whether to bypass client certificate validation for clients that do not present a certificate.
Documentation reference here.

There are also some README(s) typos fixes and formatting.

ISSUE TYPE

• Feature Pull Request
• Docs Pull Request

COMPONENT NAME

roles involved: mongod, mongos, config

ADDITIONAL INFORMATION

A new mongodb_allow_connections_without_certificates configuration variable is introduced.
As per documentation: "In most cases, it is important to ensure that clients present valid certificates. However, if you have clients that cannot present a client certificate or are transitioning to using a certificate, you may only want to validate certificates from clients that present a certificate".
This fix would enable the above mentioned scenarios where the clients involved have different requirements or capabilities.

- ansible.builtin.include_role:
    name: community.mongodb.mongodb_mongod
  vars:
    mongodb_allow_connections_without_certificates: true

It defaults to false, so it is completely opt-in.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (70e8344) 73.08% compared to head (cde4953) 73.08%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #609   +/-   ##
=======================================
  Coverage   73.08%   73.08%           
=======================================
  Files           6        6           
  Lines         929      929           
  Branches      143      143           
=======================================
  Hits          679      679           
  Misses        213      213           
  Partials       37       37           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.