Add zero-downtime-upgrades results for 1.1.0

tests/zero-downtime-upgrades/results/1.1.0/1.1.0.md

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+# Results
+
+<!-- TOC -->
+- [Results](#results)
+  - [Summary](#summary)
+  - [Versions](#versions)
+  - [Analyze](#analyze)
+    - [Tester VMs](#tester-vms)
+<!-- TOC -->
+
+## Summary
+
+For the most part everything looked good, though a couple requests failed during the https upgrade.
+Fewer 499 responses than in past releases, and didn't see any socket errors when using wrk.
+
+## Versions
+
+Kubernetes:
+
+```json
+"serverVersion": {
+    "major": "1",
+    "minor": "27",
+    "gitVersion": "v1.27.3-gke.100",
+    "gitCommit": "6466b51b762a5c49ae3fb6c2c7233ffe1c96e48c",
+    "gitTreeState": "clean",
+    "buildDate": "2023-06-23T09:27:28Z",
+    "goVersion": "go1.20.5 X:boringcrypto",
+    "compiler": "gc",
+    "platform": "linux/amd64"
+  }
+```
+
+Old NGF version:
+
+```text
+"version":"1.0.0"
+"commit":"55b17384cdd4042ffca8dcb8b5c7dec8f6729df9"
+"date":"2023-10-24T18:39:05Z"
+```
+
+New NGF version:
+
+```text
+version: "edge"
+commit: "afba7606e2d9e4a5a08e0d0431df4b9e4f3a3437"
+date: "2023-12-07T18:47:58Z"
+```
+
+### Analyze
+
+- NGF logs: no errors
+- NGINX logs: no errors
+
+Lease was properly updated, and Gateway status updated with new listener.
+
+#### Tester VMs
+
+Tester 1 wrk output:
+
+```text
+Running 1m test @ http://cafe.example.com/coffee
+  2 threads and 100 connections
+  Thread Stats   Avg      Stdev     Max   +/- Stdev
+    Latency    35.73ms   39.12ms 753.38ms   89.85%
+    Req/Sec     1.75k   577.68     3.57k    68.25%
+  Latency Distribution
+     50%   25.13ms
+     75%   45.05ms
+     90%   75.44ms
+     99%  183.71ms
+  209294 requests in 1.00m, 74.45MB read
+Requests/sec:   3486.00
+Transfer/sec:      1.24MB
+```
+
+Tester 1 graph:
+
+![http.png](http.png)
+
+Tester 2 wrk output:
+
+```text
+Running 1m test @ https://cafe.example.com/tea
+  2 threads and 100 connections
+  Thread Stats   Avg      Stdev     Max   +/- Stdev
+    Latency    34.82ms   37.53ms 753.43ms   89.95%
+    Req/Sec     1.77k   565.66     4.29k    74.50%
+  Latency Distribution
+     50%   24.07ms
+     75%   42.99ms
+     90%   72.51ms
+     99%  176.96ms
+  211751 requests in 1.00m, 73.91MB read
+Requests/sec:   3527.10
+Transfer/sec:      1.23MB
+```
+
+Tester 2 graph:
+
+![https.png](https.png)