bump istio to 1.24.x

[ca-scribner]

Enhancement Proposal

Istio 1.24.0 has been released - we should update our charm to use it.

Blockers:

• istioctl in 1.24 has removed the istioctl manifest generate --component ___ optional arguments, which we use to subdivide the istio crds. This is seen when we run a typical istioctl command like:

istioctl-1.24.0 manifest generate --set profile=minimal --set values.global.istioNamespace=istio-system --set components.base.enabled=true --set components.pilot.enabled=true --set meshConfig.accessLogFile=/dev/stdout --set components.cni.enabled=true --set values.cni.cniBinDir=/var/snap/microk8s/current/opt/cni/bin --set values.cni.cniConfDir=/var/snap/microk8s/current/args/cni-network --set values.sidecarInjectorWebhook.injectedAnnotations.traffic\.sidecar\.istio\.io/excludeOutboundIPRanges=0.0.0.0/0 --set components.ztunnel.enabled=true --set values.profile=ambient --component Pilot --component Cni --component Ztunnel --set values.pilot.env.PILOT_AUTO_ALLOW_WAYPOINT_POLICY=true
Error: unknown flag: --component

I don't see an obvious replacement feature. We'll have to look for an alternative, or come up with a better way of generating the manifests. Worst case, it is probably fine if we just generate and manage all manifests at once.