chore: release lifecycle-operator 0.8.3

:robot: I have created a release beep boop

add cloud events support (#1843) (5b47120)
lifecycle-operator: clean up KeptnTask API by removing duplicated attributes (#1965) (257b220)
metrics-operator: add analysis controller (#1875) (017e08b)
metrics-operator: add Analysis CRD (#1839) (9521a16)
monorepo setup for lifecycle-operator, scheduler and runtimes (#1857) (84e243a)

lifecycle-operator: avoid setting the overall state of an App or WorkloadInstance between state transitions (#1871) (ee0b085)

update dependency kubernetes-sigs/controller-tools to v0.13.0 (#1930) (8b34b63)
update dependency kubernetes-sigs/kustomize to v5.1.1 (#1853) (354ab3f)
update github.com/keptn/lifecycle-toolkit/klt-cert-manager digest to 440c308 (#2017) (c365734)
update github.com/keptn/lifecycle-toolkit/klt-cert-manager digest to 88a54f9 (#1794) (fc976eb)
update github.com/keptn/lifecycle-toolkit/klt-cert-manager digest to 8dbec2d (#1995) (2f51445)
update github.com/keptn/lifecycle-toolkit/klt-cert-manager digest to bb133cf (#1963) (c7697bf)
update kubernetes packages to v0.26.8 (patch) (#1945) (6ce03d6)
update module github.com/onsi/ginkgo/v2 to v2.12.0 (#2019) (41e878f)
update module github.com/onsi/gomega to v1.27.10 (#1796) (8f14bff)
update module golang.org/x/net to v0.14.0 (#1855) (3186188)
update module google.golang.org/grpc to v1.57.0 (#1861) (fdcbdf5)
update opentelemetry-go monorepo (minor) (#1931) (a0a1a7e)

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