chore: bump alpine and fluentbit image in cache

[a-thaler]

Description

Changes proposed in this pull request (what was done and why):

• bump alpine image to 3.22.2
• bump fluentbit image to 4.2.0 in cache

Changes refer to particular issues, PRs or documents:

Traceability

• The PR is linked to a GitHub issue.
• The follow-up issues (if any) are linked in the Related Issues section.
• If the change is user-facing, the documentation has been adjusted.
• If a CRD is changed, the corresponding Busola ConfigMap has been adjusted.
• The feature is unit-tested.
• The feature is e2e-tested.