Internal Encryption on/off requires activator restart

Switching `internal-encryption` to true results in a non-functioning service.
/area networking

## What version of Knative?
1.9
Using Kourier

## Expected Behavior

Service should continue to serve ingress traffic.

## Actual Behavior

Service stopped serving ingress traffic.
Clients receive 503

## Steps to Reproduce the Problem
---- Attempt 1:
```sh
kn quickstart kind --install-serving
...
```

Use `kubectl edit cm config-network -n knative-serving` and set `internal-encryption` to "true"

```sh
kn service create hello --image gcr.io/knative-samples/helloworld-go --port 8080 --env TARGET=World
...
19.014s Ingress has not yet been reconciled.
19.101s Waiting for load balancer to be ready
...
```
----- Attempts 2:
```sh
kn quickstart kind --install-serving
...

kn service create hello --image gcr.io/knative-samples/helloworld-go --port 8080 --env TARGET=World
...
Service 'hello' created to latest revision 'hello-00001' is available at URL:
http://hello.default.127.0.0.1.sslip.io

curl http://hello.default.127.0.0.1.sslip.io -v
* Trying 127.0.0.1:80...
...
< HTTP/1.1 200 OK
...
Hello World!
...
```

Use `kubectl edit cm config-network -n knative-serving` and set `internal-encryption` to "true"

```
curl http://hello.default.127.0.0.1.sslip.io -v
...
< HTTP/1.1 503 Service Unavailable
< content-length: 145
< content-type: text/plain
< date: Mon, 27 Feb 2023 23:30:17 GMT
< server: envoy
<
* Connection #0 to host hello.default.127.0.0.1.sslip.io left intact
upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111
```

Reproduce with `kn quickstart kind --install-serving`, then edit the `config-network` ConfigMap as described and test the service with `curl`. Trace how the `internal-encryption` setting reaches the Kourier ingress components; done means enabling it does not require an activator restart and ingress continues returning the service response instead of 503.

Written by the indexing model from the issue text.