feat: prepare for high availability

[reshnm]

What this PR does / why we need it:

This PR does the following:

• Set the LeaderElectionNamespace to the POD namespace (from environment) for the openmcp-operator and the platform-service mcp
• Add the field RunReplicas to the deployment spec for cluster providers, service providers, platform services. This sets the replicas of the run deployment. If greater than 1, it automatically sets the flag --leader-elect=true for the run deployment
• Add the field TopologySpreadConstraints to the deployment spec. This can be used to control the spread of the run pods (e.g. zone, hostname etc.). The matching labels will be automatically added to the pod template labels and the topology spread contraints match labels.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Release note:

Add high availability features for the openmcp-operator and service-providers, cluster-providers and platform-services