app-emulation/docker*: build docker with Go 1.19

Go 1.18 is already EOL, so no security update at all. Since
upstream docker projects already have Go 1.19, Flatcar should also have
that.

See also
https://github.com/moby/moby/blob/5d6db842238e3c4f5f9fb9ad70ea46b35227d084/Dockerfile#L6.

sdk_container/src/third_party/coreos-overlay/app-emulation/docker-cli/docker-cli-20.10.24.ebuild

@@ -6,7 +6,7 @@ GIT_COMMIT=e78084afe5
 EGO_PN="github.com/docker/cli"
 
 COREOS_GO_PACKAGE="${EGO_PN}"
-COREOS_GO_VERSION="go1.18"
+COREOS_GO_VERSION="go1.19"
 
 inherit bash-completion-r1  golang-vcs-snapshot coreos-go-depend
 

sdk_container/src/third_party/coreos-overlay/app-emulation/docker-proxy/docker-proxy-0.8.0_p20230118.ebuild

@@ -8,7 +8,7 @@ inherit golang-vcs-snapshot
 
 # Flatcar: Add coreos go goo.
 COREOS_GO_PACKAGE="${EGO_PN}"
-COREOS_GO_VERSION="go1.18"
+COREOS_GO_VERSION="go1.19"
 COREOS_GO_GO111MODULE="off"
 
 inherit coreos-go

sdk_container/src/third_party/coreos-overlay/app-emulation/docker-runc/docker-runc-1.1.7.ebuild

@@ -5,7 +5,7 @@ EAPI=6
 
 GITHUB_URI="github.com/opencontainers/runc"
 COREOS_GO_PACKAGE="${GITHUB_URI}"
-COREOS_GO_VERSION="go1.18"
+COREOS_GO_VERSION="go1.19"
 # the commit of runc that docker uses.
 # see https://github.com/docker/docker-ce/blob/v19.03.15/components/engine/hack/dockerfile/install/runc.installer#L4
 COMMIT_ID="532d81d385677036958916d9aed5dd3431c5edb5"

sdk_container/src/third_party/coreos-overlay/app-emulation/docker/docker-20.10.24-r1.ebuild

@@ -7,7 +7,7 @@ MY_PV=${PV/_/-}
 GIT_COMMIT=d6cbf44b8c
 inherit linux-info systemd udev golang-vcs-snapshot
 
-COREOS_GO_VERSION="go1.18"
+COREOS_GO_VERSION="go1.19"
 COREOS_GO_GO111MODULE="off"
 
 inherit coreos-go-depend