chore(packages): add sync_trunk_next-gen rules for next-gen image delivery (#630)

Close PingCAP-QE/ci#3537

This pull request introduces a new configuration for "next-gen" image
synchronization in the `packages/delivery.yaml` file. It adds a
`sync_trunk_next-gen` definition and integrates it into the
`image_copy_rules` section for several components, enabling the delivery
of next-gen images to specific repositories.

### Configuration Updates for Next-Gen Image Synchronization:

* **Definition Addition**:
- Added `sync_trunk_next-gen` definition with a description and regex
pattern for identifying next-gen branches. (`packages/delivery.yaml`,
[packages/delivery.yamlR13-R16](diffhunk://#diff-95b19687ffd73deffa23edebbb4b0a94ba865cb9c854c36a77281c93703822e6R13-R16))

* **Integration in Image Copy Rules**:
- Updated rules for `tidb-server` to include next-gen synchronization to
`gcr.io/pingcap-public/dbaas/tidb`. (`packages/delivery.yaml`,
[packages/delivery.yamlR133-R135](diffhunk://#diff-95b19687ffd73deffa23edebbb4b0a94ba865cb9c854c36a77281c93703822e6R133-R135))
- Updated rules for `br` to include next-gen synchronization to
`gcr.io/pingcap-public/dbaas/br`. (`packages/delivery.yaml`,
[packages/delivery.yamlR157-R159](diffhunk://#diff-95b19687ffd73deffa23edebbb4b0a94ba865cb9c854c36a77281c93703822e6R157-R159))
- Updated rules for `tidb-lightning` to include next-gen synchronization
to `gcr.io/pingcap-public/dbaas/tidb-lightning`.
(`packages/delivery.yaml`,
[packages/delivery.yamlR181-R183](diffhunk://#diff-95b19687ffd73deffa23edebbb4b0a94ba865cb9c854c36a77281c93703822e6R181-R183))
- Updated rules for `dumpling` to include next-gen synchronization to
`gcr.io/pingcap-public/dbaas/dumpling`. (`packages/delivery.yaml`,
[packages/delivery.yamlR205-R207](diffhunk://#diff-95b19687ffd73deffa23edebbb4b0a94ba865cb9c854c36a77281c93703822e6R205-R207))
- Updated rules for `tiflash` to include next-gen synchronization to
`gcr.io/pingcap-public/dbaas/tiflash`. (`packages/delivery.yaml`,
[packages/delivery.yamlR293-R295](diffhunk://#diff-95b19687ffd73deffa23edebbb4b0a94ba865cb9c854c36a77281c93703822e6R293-R295))
- Updated rules for `pd` to include next-gen synchronization to
`gcr.io/pingcap-public/dbaas/pd`. (`packages/delivery.yaml`,
[packages/delivery.yamlR407-R409](diffhunk://#diff-95b19687ffd73deffa23edebbb4b0a94ba865cb9c854c36a77281c93703822e6R407-R409))

Author: wuhuizuo

packages/delivery.yaml

@@ -10,6 +10,10 @@ definitions:
     tags_regex: [^master(-experiment)?$]
     constant_tags: [nightly] # add new tags.
   sync_trunk_enterprise: &sync_trunk_enterprise {}
+  sync_trunk_next-gen: &sync_trunk_next-gen
+    description: delivery next-gen images for developing branches.
+    tags_regex:
+      - ^(master|dedicated|feature_next-gen.*)(-.*)?-next-gen$
   sync_pre_community: &sync_pre_community
     description: delivery community images for release branches.
     tags_regex:
@@ -126,6 +130,9 @@ image_copy_rules:
         - docker.io/pingcap/tidb-operator-prestop-hook
         - gcr.io/pingcap-public/dbaas/tidb-operator-prestop-hook
   hub.pingcap.net/pingcap/tidb/images/tidb-server:
+    - <<: *sync_trunk_next-gen
+      dest_repositories:
+        - gcr.io/pingcap-public/dbaas/tidb
     - <<: *sync_trunk_community
       dest_repositories:
         - docker.io/pingcap/tidb
@@ -147,6 +154,9 @@ image_copy_rules:
         - gcr.io/pingcap-public/dbaas/tidb
         - docker.io/pingcap/tidb-enterprise
   hub.pingcap.net/pingcap/tidb/images/br:
+    - <<: *sync_trunk_next-gen
+      dest_repositories:
+        - gcr.io/pingcap-public/dbaas/br
     - <<: *sync_trunk_community
       dest_repositories:
         - docker.io/pingcap/br
@@ -168,6 +178,9 @@ image_copy_rules:
         - gcr.io/pingcap-public/dbaas/br
         - docker.io/pingcap/br-enterprise
   hub.pingcap.net/pingcap/tidb/images/tidb-lightning:
+    - <<: *sync_trunk_next-gen
+      dest_repositories:
+        - gcr.io/pingcap-public/dbaas/tidb-lightning
     - <<: *sync_trunk_community
       dest_repositories:
         - docker.io/pingcap/tidb-lightning
@@ -189,6 +202,9 @@ image_copy_rules:
         - gcr.io/pingcap-public/dbaas/tidb-lightning
         - docker.io/pingcap/tidb-lightning-enterprise
   hub.pingcap.net/pingcap/tidb/images/dumpling:
+    - <<: *sync_trunk_next-gen
+      dest_repositories:
+        - gcr.io/pingcap-public/dbaas/dumpling
     - <<: *sync_trunk_community
       dest_repositories:
         - docker.io/pingcap/dumpling
@@ -274,6 +290,9 @@ image_copy_rules:
       dest_repositories:
         - docker.io/pingcap/sync-diff-inspector
   hub.pingcap.net/pingcap/tiflash/image:
+    - <<: *sync_trunk_next-gen
+      dest_repositories:
+        - gcr.io/pingcap-public/dbaas/tiflash
     - <<: *sync_trunk_community
       dest_repositories:
         - docker.io/pingcap/tiflash
@@ -385,6 +404,9 @@ image_copy_rules:
         - gcr.io/pingcap-public/dbaas/tikv
         - docker.io/pingcap/tikv-enterprise
   hub.pingcap.net/tikv/pd/image:
+    - <<: *sync_trunk_next-gen
+      dest_repositories:
+        - gcr.io/pingcap-public/dbaas/pd
     - <<: *sync_trunk_community
       dest_repositories:
         - docker.io/pingcap/pd