Update docs for cis hardening

[ktsakalozos]

• update the CIS hardening how-to with CIS auditing section
• update the CIS reports generation tool to give us the format we want
• update the CIS hardening checks to include dqlite in place of etcd
• review the CIS hardening checks

[github-actions]

Hi, looks like pyspelling job found some issues, you can check it here

[bschimke95]

LGTM, @nhennigan to give final approval.

[nhennigan]

There were a few cases where the expected output did not match the remediation suggestion. If this is meant to be the expected output of the system as is when shipped then ignore my comments but we should make that clear.

We also have (automated) and (manual) beside all audit steps. Do we mean that automated steps should be configured by default? If so there were a few on my local tests that were labeled (automated) but not set