Use MongoDB 4.4

Later MongoDB fails on machines without AVX instructions.

Additionally, make image jobs ignore certain irrelevant changes.

Change-Id: I7d1081fb96c903abede71acc0df676928f4fec1a

charts/nebulous-gui-controller/templates/mongodb.yaml

@@ -16,7 +16,7 @@ spec:
     spec:
       containers:
         - name: mongodb
-          image: "docker.io/mongodb/mongodb-community-server:7.0.7-ubuntu2204"
+          image: "docker.io/mongodb/mongodb-community-server:4.4.29-ubuntu2004"
           ports:
             - name: mongodb
               containerPort: 27017

zuul.d/jobs.yaml

@@ -9,6 +9,10 @@
     description: Build the container images.
     files: &image_files
       - ^/
+    # NOTE(rpiliszek): Adding this due to the repo structure.
+    irrelevant-files: &image_irrelevant_files
+      - ^/charts/
+      - ^/zuul.d/
     vars: &image_vars
       promote_container_image_job: nebulous-gui-controller-upload-container-images
       container_images:
@@ -29,6 +33,7 @@
       - nebulous-gui-controller-container-images
     description: Build and upload the container images.
     files: *image_files
+    irrelevant-files: *image_irrelevant_files
     vars: *image_vars
 
 - job:
@@ -36,6 +41,7 @@
     parent: nebulous-promote-container-images
     description: Promote previously uploaded container images.
     files: *image_files
+    irrelevant-files: *image_irrelevant_files
     vars: *image_vars
 
 - job: