Fixes bug #1787 non-k8s: KubeArmor panics when not-enabled policy type is received

[itsCheithanya]

This fixes the bug that KubeArmor panics when not-enabled policy type is being received
Reproduce the issue :
Modify make run target in KubeArmor's Makefile to something like below such that host policy is disabled:

 cd $(CURDIR); DEBUG=true sudo -E ./kubearmor -k8s=false -logPath=/tmp/kubearmor.log -enableKubeArmorPolicy -defaultFilePosture block -defaultCapabilitiesPosture block -defaultNetworkPosture block 

Once KubeArmor is running, send the below host policy by running karmor vm policy --gRPC=:32767 add <path-to-policy> :

apiVersion: security.kubearmor.com/v1
kind: KubeArmorHostPolicy
metadata:
  name: hsp-block-sleep
spec:
  severity: 10
  message: "sleep was attempted to be executed"
  tags:
  - ALERT
  nodeSelector:
    matchLabels:
      kubearmor.io/hostname: '*'
  process:
    matchPaths:
    - path: /usr/bin/sleep
  action:
    Block

You'll see that KubeArmor doesn't panic :

Fixes #1787

If the changes in this PR are manually verified, list down the scenarios covered::

Additional information for reviewer? :
Mention if this PR is part of any design or a continuation of previous PRs

Checklist:

• Bug fix. Fixes non-k8s: KubeArmor panics when not-enabled policy type is received #1787
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• PR Title follows the convention of <type>(<scope>): <subject>
• Commit has unit tests
• Commit has integration tests

[DelusionalOptimist]

Thanks @itsCheithanya!
Minor changes to address... Looking good otherwise.

[DelusionalOptimist]

Thanks for addressing the changes.
Please see the comments inline @itsCheithanya

[DelusionalOptimist]

LGTM. Thanks @itsCheithanya! 🚀
Please rebase with main so that we can merge.

Can you also do the changes required for handling this new error code in kubearmor-client?

[itsCheithanya]

LGTM. Thanks @itsCheithanya! 🚀 Please rebase with main so that we can merge.

Can you also do the changes required for handling this new error code in kubearmor-client?

Sure will do that :)