Update controller-runtime to v0.15 (#409)

* update k8s deps

* update readme

* revert controller runtime and tools version

* api version match

* downgrade to k8s 0.26

* update controller tools

* update api version and comment

* revert to 4.14

* update k8s version of crdrefdocs

* update openshift api latest commit, upgrade k8s to v0.27.7

* run make generate

---------

Co-authored-by: Kanika Rana <krana@krana-mac.ht.home>
Co-authored-by: Francisc Munteanu <fmuntean@redhat.com>

README.adoc

@@ -8,8 +8,8 @@ For the API reference docs go xref:api/v1alpha1/docs/apiref.adoc[here]
 == Building
 Requires:
 
-* Go version 1.18.x (1.18.8 or higher) - download for your development environment https://golang.org/dl/[here].
-* Operator SDK v1.23.0 - download for your development environment https://v1-23-x.sdk.operatorframework.io/docs/installation/#install-from-github-release[here]
+* Go version 1.20.x (1.20.11 or higher) - download for your development environment https://golang.org/dl/[here].
+* Operator SDK v1.25.0 - download for your development environment https://v1-25-x.sdk.operatorframework.io/docs/installation/#install-from-github-release[here]
 
 CodeReady ToolChain API is built using https://github.com/golang/go/wiki/Modules[Go modules].