Give the real proxy the farm's proxy token, as the console will

The e2e scripts handed the proxy a pre-minted edge JWT, which hid that the
proxy could not exchange its configured token for one. It now does, so the
scripts configure it the way a real gateway is configured: with the farm's
edge proxy token.

scripts/e2e-camera.sh

@@ -268,7 +268,7 @@ echo "==> starting the real continuum-proxy, which spawns the real go2rtc"
 env -C "$PROXY_DIR" \
   CONTINUUM_GATEWAY_ID=e2e-cam-gw \
   CONTINUUM_FARM_ID="$FARM_ID" \
-  CONTINUUM_GATEWAY_TOKEN="$TOKEN" \
+  CONTINUUM_GATEWAY_TOKEN="$EDGE_PROXY_TOKEN" \
   CONTINUUM_UPLINK_URL="ws://localhost:$PORT/ws/edge/v1" \
   CONTINUUM_GO2RTC_BIN="$GO2RTC_BIN" \
   CONTINUUM_GO2RTC_CONFIG="$WORK/go2rtc.yaml" \

scripts/e2e-edge.sh

@@ -209,7 +209,7 @@ STREAM_BASE_URL="http://e2e-gateway.invalid:1984"
 env -C "$PROXY_DIR" \
   CONTINUUM_GATEWAY_ID=e2e-gw \
   CONTINUUM_FARM_ID="$FARM_ID" \
-  CONTINUUM_GATEWAY_TOKEN="$TOKEN" \
+  CONTINUUM_GATEWAY_TOKEN="$EDGE_PROXY_TOKEN" \
   CONTINUUM_UPLINK_URL="ws://localhost:$PORT/ws/edge/v1" \
   `# Deliberately absent, not an oversight: what is under test is the config` \
   `# the gateway writes and the camera_stream it advertises, both of which` \

scripts/e2e-provision-proxy.sh

@@ -191,7 +191,7 @@ start_proxy() {
   env -C "$PROXY_DIR" \
     CONTINUUM_GATEWAY_ID=e2e-gw \
     CONTINUUM_FARM_ID="$FARM_A" \
-    CONTINUUM_GATEWAY_TOKEN="$EDGE_JWT" \
+    CONTINUUM_GATEWAY_TOKEN="$PROXY_TOKEN" \
     CONTINUUM_UPLINK_URL="ws://localhost:$PORT/ws/edge/v1" \
     CONTINUUM_GO2RTC_BIN=/nonexistent-go2rtc \
     CONTINUUM_GO2RTC_CONFIG="$WORK/go2rtc.yaml" \