feat: add post handler

[knqyf263]

Description

Analyzers take a single file and process it one by one, but post handlers will be called after analysis. It would be useful for processes that require multiple files, such as Terraform scanning.

TODO

• [x] Add post handler
• [x] Misconfiguration result
  • [x] Failure
  • [x] Exception
  • [x] Success
  • [x] https://github.com/aquasecurity/defsec/pull/511
  • [x] Warning
  • [x] https://github.com/aquasecurity/defsec/pull/512
• [x] Parsers
  • [x] Terraform
  • [x] ~Any chance to support .tfvars?~ - this is supported via a separate option :+1:
  • [x] The support for file patterns for Terraform may help
    • [x] https://github.com/aquasecurity/fanal/blob/3edc37bd2d88b33352dc1a7de07c3dcd788a1028/analyzer/config/terraform/terraform.go#L18
  • [x] CloudFormation
  • [x] https://github.com/aquasecurity/defsec/issues/504
  • [x] Dockerfile
  • [x] Kubernetes
  • [x] https://github.com/aquasecurity/defsec/issues/504
  • [x] https://github.com/aquasecurity/defsec/issues/505
• [x] Scanner options
  • [x] trace https://github.com/aquasecurity/defsec/pull/518
  • [x] https://github.com/aquasecurity/fanal/blob/3edc37bd2d88b33352dc1a7de07c3dcd788a1028/handler/misconf/misconf.go#L71-L72
  • [x] policy dirs
  • [x] data dirs
  • [x] namespaces
• [x] Move some logic to DefSec
  • [x] https://github.com/aquasecurity/fanal/blob/86769d34051fd26e6f89c8def93da012ee56805d/handler/misconf/misconf.go#L155
  • [x] https://github.com/aquasecurity/fanal/blob/86769d34051fd26e6f89c8def93da012ee56805d/handler/misconf/misconf.go#L40
• [x] Drop TOML and HCL
• [x] Remove config parsers
• [x] Remove config scanners
• [x] Fix tests

Related PRs

• [x] https://github.com/aquasecurity/defsec/pull/507