Fix GnuPG missing directory

[didierofrivia]

In order to fix the chart creation and signing job: https://github.com/Kuadrant/dns-operator/actions/runs/13154643618/job/36708905169#step:3:8

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.36%. Comparing base (9f79273) to head (dd2f696).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1161      +/-   ##
==========================================
- Coverage   83.63%   83.36%   -0.28%     
==========================================
  Files          81       81              
  Lines        6943     6943              
==========================================
- Hits         5807     5788      -19     
- Misses        913      929      +16     
- Partials      223      226       +3     

Flag	Coverage Δ
bare-k8s-integration	22.64% <ø> (-0.25%)	⬇️
controllers-integration	75.01% <ø> (+0.05%)	⬆️
envoygateway-integration	40.39% <ø> (-0.22%)	⬇️
gatewayapi-integration	19.54% <ø> (+0.07%)	⬆️
istio-integration	43.32% <ø> (+0.04%)	⬆️
unit	19.57% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
api/v1beta1 (u)	90.00% <ø> (ø)
api/v1beta2 (u)	∅ <ø> (∅)
pkg/common (u)	∅ <ø> (∅)
pkg/istio (u)	62.06% <ø> (ø)
pkg/log (u)	93.18% <ø> (ø)
pkg/reconcilers (u)	24.67% <ø> (ø)
pkg/rlptools (u)	∅ <ø> (∅)
controllers (i)	86.65% <ø> (-0.18%)	⬇️

see 6 files with indirect coverage changes