chore(release): prepare for release (#863)

* chore(release): update mergify config

* chore(release): bump version to 4.0.0-dev

* Update containerImage annotation

---------

Co-authored-by: Elliott Baron <ebaron@redhat.com>

.mergify.yml

@@ -1,12 +1,12 @@
 pull_request_rules:
-  - name: backport patches to cryostat-v2.4 branch
+  - name: backport patches to cryostat-v3.0 branch
     conditions:
       - base=main
       - label=backport
     actions:
       backport:
         branches:
-          - cryostat-v2.4
+          - cryostat-v3.0
         assignees:
           - "{{ author }}"
   - name: auto label PRs from reviewers

Makefile

@@ -8,7 +8,7 @@ OS = $(shell go env GOOS)
 ARCH = $(shell go env GOARCH)
 
 # Current Operator version
-export OPERATOR_VERSION ?= 3.0.0-dev
+export OPERATOR_VERSION ?= 4.0.0-dev
 IMAGE_VERSION ?= $(OPERATOR_VERSION)
 BUNDLE_VERSION ?= $(IMAGE_VERSION)
 DEFAULT_NAMESPACE ?= quay.io/cryostat
@@ -62,7 +62,7 @@ export APP_NAME ?= Cryostat
 # Images used by the operator
 CORE_NAMESPACE ?= $(DEFAULT_NAMESPACE)
 CORE_NAME ?= cryostat
-CORE_VERSION ?= 3.0.0-snapshot
+CORE_VERSION ?= 4.0.0-snapshot
 export CORE_IMG ?= $(CORE_NAMESPACE)/$(CORE_NAME):$(CORE_VERSION)
 OAUTH2_PROXY_NAMESPACE ?= quay.io/oauth2-proxy
 OAUTH2_PROXY_NAME ?= oauth2-proxy
@@ -109,7 +109,7 @@ ENVTEST_K8S_VERSION ?= 1.26
 # See: https://github.com/operator-framework/operator-sdk/pull/4762
 #
 # Suffix is the timestamp of the image build, compute with: date -u '+%Y%m%d%H%M%S'
-CUSTOM_SCORECARD_VERSION ?= 3.0.0-$(shell date -u '+%Y%m%d%H%M%S')
+CUSTOM_SCORECARD_VERSION ?= 4.0.0-$(shell date -u '+%Y%m%d%H%M%S')
 export CUSTOM_SCORECARD_IMG ?= $(IMAGE_TAG_BASE)-scorecard:$(CUSTOM_SCORECARD_VERSION)
 
 DEPLOY_NAMESPACE ?= cryostat-operator-system

config/manifests/bases/cryostat-operator.clusterserviceversion.yaml

@@ -4,7 +4,7 @@ metadata:
   annotations:
     capabilities: Seamless Upgrades
     categories: Monitoring, Developer Tools
-    containerImage: quay.io/cryostat/cryostat-operator:3.0.0-dev
+    containerImage: quay.io/cryostat/cryostat-operator:4.0.0-dev
     description: JVM monitoring and profiling tool
     operatorframework.io/initialization-resource: |-
       {