Temporary revert GPG feature for semver based retagging (#373)

Feature #343 happens to be a breaking change when enabling `.Values.signing` but not specifying
any of the new private key properties. Tag `v6.0.2` is therefore not following semantic versioning.

This temporarily reverts commit b8f0310c43 and a fix-up commit 57a1cd27d9
to retag 6.0.2 as 6.0.3.

Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/373
Reviewed-by: techknowlogick <techknowlogick@gitea.io>
Reviewed-by: luhahn <luhahn@noreply.gitea.io>

unittests/statefulset/basic.yaml

@@ -1,17 +0,0 @@
-suite: Statefulset template (basic)
-release:
-  name: gitea-unittests
-  namespace: testing
-templates:
-  - templates/gitea/statefulset.yaml
-  - templates/gitea/config.yaml
-tests:
-  - it: renders a statefulset
-    template: templates/gitea/statefulset.yaml
-    asserts:
-      - hasDocuments:
-          count: 1
-      - containsDocument:
-          kind: StatefulSet  
-          apiVersion: apps/v1
-          name: gitea-unittests

unittests/statefulset/signing-disabled.yaml

@@ -1,40 +0,0 @@
-suite: Statefulset template (signing disabled)
-release:
-  name: gitea-unittests
-  namespace: testing
-templates:
-  - templates/gitea/statefulset.yaml
-  - templates/gitea/config.yaml
-tests:
-  - it: skips gpg init container
-    template: templates/gitea/statefulset.yaml
-    asserts:
-      - notContains:
-          path: spec.template.spec.initContainers
-          any: true
-          content:
-            name: configure-gpg
-  - it: skips gpg env in `init-directories` init container
-    template: templates/gitea/statefulset.yaml
-    set:
-      signing.enabled: true
-    asserts:
-      - contains:
-          path: spec.template.spec.initContainers[0].env
-          content:
-            name: GNUPGHOME
-            value: /data/git/.gnupg
-  - it: skips gpg env in runtime container
-    template: templates/gitea/statefulset.yaml
-    asserts:
-      - notContains:
-          path: spec.template.spec.containers[0].env
-          content:
-            name: GNUPGHOME
-  - it: skips gpg volume spec
-    template: templates/gitea/statefulset.yaml
-    asserts:
-      - notContains:
-          path: spec.template.spec.volumes
-          content:
-            name: gpg-private-key

unittests/statefulset/signing-enabled.yaml

@@ -1,93 +0,0 @@
-suite: Statefulset template (signing enabled)
-release:
-  name: gitea-unittests
-  namespace: testing
-templates:
-  - templates/gitea/statefulset.yaml
-  - templates/gitea/config.yaml
-tests:
-  - it: adds gpg init container
-    template: templates/gitea/statefulset.yaml
-    set:
-      signing:
-        enabled: true
-        existingSecret: "custom-gpg-secret"
-    asserts:
-      - equal:
-          path: spec.template.spec.initContainers[2].name
-          value: configure-gpg
-      - equal:
-          path: spec.template.spec.initContainers[2].command
-          value: ["/usr/sbin/configure_gpg_environment.sh"]
-      - equal:
-          path: spec.template.spec.initContainers[2].securityContext
-          value:
-            runAsUser: 1000
-      - equal:
-          path: spec.template.spec.initContainers[2].env
-          value:
-            - name: GNUPGHOME
-              value: /data/git/.gnupg
-      - equal:
-          path: spec.template.spec.initContainers[2].volumeMounts
-          value:
-            - name: init
-              mountPath: /usr/sbin
-            - name: data
-              mountPath: /data
-            - name: gpg-private-key
-              mountPath: /raw
-              readOnly: true
-  - it: adds gpg env in `init-directories` init container
-    template: templates/gitea/statefulset.yaml
-    set:
-      signing.enabled: true
-    asserts:
-      - contains:
-          path: spec.template.spec.initContainers[0].env
-          content:
-            name: GNUPGHOME
-            value: /data/git/.gnupg
-  - it: adds gpg env in runtime container
-    template: templates/gitea/statefulset.yaml
-    set:
-      signing.enabled: true
-    asserts:
-      - contains:
-          path: spec.template.spec.containers[0].env
-          content:
-            name: GNUPGHOME
-            value: /data/git/.gnupg
-  - it: adds gpg volume spec
-    template: templates/gitea/statefulset.yaml
-    set:
-      signing:
-        enabled: true
-    asserts:
-      - contains:
-          path: spec.template.spec.volumes
-          content:
-            name: gpg-private-key
-            secret:
-              secretName: gitea-unittests-gpg-key
-              items:
-                - key: privateKey
-                  path: private.asc
-              defaultMode: 0100
-  - it: supports gpg volume spec with external reference
-    template: templates/gitea/statefulset.yaml
-    set:
-      signing:
-        enabled: true
-        existingSecret: custom-gpg-secret
-    asserts:
-      - contains:
-          path: spec.template.spec.volumes
-          content:
-            name: gpg-private-key
-            secret:
-              secretName: custom-gpg-secret
-              items:
-                - key: privateKey
-                  path: private.asc
-              defaultMode: 0100