Installation Improvement

[kilosonc]

1. support creating pvc whose storage greater than 20Gi https://github.com/horizoncd/horizon/issues/84
2. distributing horizon with k3s embeded https://github.com/horizoncd/horizon/discussions/81
3. upgrade horizon helm chart to suppport k8s v1.25 & v1.26
4. we need the minimized intallation of horizon, which means we can install horizon without harbor, redis, minio, gitlab, etc.

To complete the minimal installation, we have listed the following tasks:

Task	Description	Assignees	Status
Merge Core with Job	After merging core and job, where a job can only have one instance, we need to rely on Kubernetes to implement the corresponding leader election logic so that the main instance can run the job logic on a goroutine.	@kilosonc	Done
Simplify Registry	Harbor requires a lot of running resources. We plan to replace Harbor with a more lightweight image repository to facilitate launching Horizon locally.	@kilosonc	Done
Extrenal Gitlab	Horizon should support users to use an external GitLab, such as a public GitLab service.	@kilosonc	Done
Horizon configuration automaticlly	Now, after pulling up the Horizon system, we need configure kubernetes, environment, registry manually. We need an automated script to do the configuration instead of having the user configure it manually	@kilosonc	Done
Remove Redis	Now redis is used to store session, we can just use memory to store session	@fdiskbrain	Done
Remove Minio	Minio is used to store log of the PipelineRun, actually we don't need it if we didn't	@xuzhu-591	Done