If issuing a restart or updating an image, do that first before applying anything else.

[nhudson]

This code change add handling if a restart is issued or if an image update is issued in the case where multiple values are being updated.

For example if you issue a restart whist also updating another value in CoreDB, this will make sure that the restart is done first before doing anything else. Also if you are updating the image it will apply the image update first before doing anything else. It should negate seeing this error in the controller logs

2024-02-16T14:31:37.145986Z ERROR reconciling object:reconcile:reconcile:reconcile_cnpg: controller::cloudnativepg::cnpg:1079: Error patching cluster: ApiError: admission webhook "vcluster.cnpg.io" denied the request: Cluster.cluster.cnpg.io "org-v0idpwn-industries-inst-smol-tri" is invalid: spec.imageName: Invalid value: "387894460527.dkr.ecr.us-east-1.amazonaws.com/tembo-io/standard-cnpg:15-a0a5ab5": Can't change image name and configuration at the same time. There are differences in PostgreSQL configuration parameters: {"effective_io_concurrency":["","100"]}: Invalid (ErrorResponse { status: "Failure", message: "admission webhook \"vcluster.cnpg.io\" denied the request: Cluster.cluster.cnpg.io \"org-v0idpwn-industries-inst-smol-tri\" is invalid: spec.imageName: Invalid value: \"387894460527.dkr.ecr.us-east-1.amazonaws.com/tembo-io/standard-cnpg:15-a0a5ab5\": Can't change image name and configuration at the same time. There are differences in PostgreSQL configuration parameters: {\"effective_io_concurrency\":[\"\",\"100\"]}", reason: "Invalid", code: 422 }) object.ref=CoreDB.v1alpha1.coredb.io/org-v0idpwn-industries-inst-smol-tri.org-v0idpwn-industries-inst-smol-tri object.reason=reconciler requested retry trace_id=00000000000000000000000000000000 instance_name=org-v0idpwn-industries-inst-smol-tri

Fixes: PLAT-539 & PLAT-77