Pin windows build Go version (#8387)

Signed-off-by: Michel Hollands <michel.hollands@grafana.com>
Signed-off-by: Christian Haudum <christian.haudum@gmail.com>
Co-authored-by: Christian Haudum <christian.haudum@gmail.com>

.drone/drone.jsonnet

@@ -137,14 +137,14 @@ local promtail_win() = pipeline('promtail-windows') {
   steps: [
     {
       name: 'identify-runner',
-      image: 'golang:windowsservercore-1809',
+      image: 'golang:1.19-windowsservercore-1809',
       commands: [
         'Write-Output $env:DRONE_RUNNER_NAME',
       ],
     },
     {
       name: 'test',
-      image: 'golang:windowsservercore-1809',
+      image: 'golang:1.19-windowsservercore-1809',
       commands: [
         'go test .\\clients\\pkg\\promtail\\targets\\windows\\... -v',
       ],

.drone/drone.yml

@@ -1279,11 +1279,11 @@ platform:
 steps:
 - commands:
   - Write-Output $env:DRONE_RUNNER_NAME
-  image: golang:windowsservercore-1809
+  image: golang:1.19-windowsservercore-1809
   name: identify-runner
 - commands:
   - go test .\clients\pkg\promtail\targets\windows\... -v
-  image: golang:windowsservercore-1809
+  image: golang:1.19-windowsservercore-1809
   name: test
 trigger:
   ref:
@@ -1675,6 +1675,6 @@ kind: secret
 name: gpg_private_key
 ---
 kind: signature
-hmac: fbc93106cac3a989c4b910682f2e08eadc21786d8502f3270bc2f4a5b1996b21
+hmac: c1930caa8e7ffedf82b641cc1204d87319cddf576efa787d2ef1a86d16c2b9cf
 
 ...