Kyverno Policies: Remove disallow-shared-subpath-volume-writes policy

Package Merge Request

Package Changes

https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/kyverno-policies/-/blob/1.1.0-bb.0/CHANGELOG.md

Additionally this MR re-enables the image signature policy in CI, with a commented out IB key to prevent the bug with this policy.

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/sandbox/kyverno-policies/-/merge_requests/61

Release upgrade notice

Kyverno Policies:

• This release completely removes the disallow-shared-subpath-volume-writes policy
• This policy was intended to prevent exploitation of a CVE in older k8s versions, however all vulnerable k8s versions are now EOL
• If you do not upgrade the Kyverno Policies package this release you will need to disable this policy or add exceptions for a number of packages, the necessary exceptions for this policy are no longer maintained by Big Bang
• To disable the policy entirely use the below values:

  kyvernopolicies:
    values:
      policies:
        disallow-shared-subpath-volume-writes:
          enabled: false