ci: skip apt update for ubuntu 19.10

It's been failing for the past day

.github/workflows/gen_ubuntu19.10.yml

@@ -20,9 +20,6 @@ jobs:
     - name: "set APT to non-interactive"
       shell: bash
       run: "echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections"
-    - name: "Update APT"
-      shell: bash
-      run: "apt update"
     - name: "Install git"
       shell: bash
       run: "apt-get install -y git"

.github/workflows/gen_ubuntu19.10_continuous.yml

@@ -20,13 +20,6 @@ jobs:
             echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
             
 
-    - name: "Update APT"
-      shell: bash
-      run: |
-            export BUILD_REASON=Schedule
-            apt update
-            
-
     - name: "Install git"
       shell: bash
       run: |

.github/workflows/gen_ubuntu19.10_tag.yml

@@ -17,9 +17,6 @@ jobs:
     - name: "set APT to non-interactive"
       shell: bash
       run: "echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections"
-    - name: "Update APT"
-      shell: bash
-      run: "apt update"
     - name: "Install git"
       shell: bash
       run: "apt-get install -y git"

ci/generate-workflows.py

@@ -102,6 +102,7 @@ class Target(object):
         rust_target=None,
         continuous_only=False,
         app_image=False,
+        skip_apt_update=False,
     ):
         if not name:
             if container:
@@ -115,6 +116,7 @@ class Target(object):
         self.rust_target = rust_target
         self.continuous_only = continuous_only
         self.app_image = app_image
+        self.skip_apt_update = skip_apt_update
 
     def uses_yum(self):
         if "fedora" in self.name:
@@ -430,9 +432,10 @@ cargo build --all --release""",
                     ),
                 ]
             sudo = "sudo -n " if self.needs_sudo() else ""
-            steps += [
-                RunStep("Update APT", f"{sudo}apt update"),
-            ]
+            if not self.skip_apt_update:
+                steps += [
+                    RunStep("Update APT", f"{sudo}apt update"),
+                ]
         if self.container:
             if self.container == "centos:8":
                 steps += [
@@ -511,7 +514,7 @@ cargo build --all --release""",
 TARGETS = [
     Target(name="ubuntu:16", os="ubuntu-16.04", app_image=True),
     Target(name="ubuntu:18", os="ubuntu-18.04", continuous_only=True),
-    Target(container="ubuntu:19.10", continuous_only=True),
+    Target(container="ubuntu:19.10", continuous_only=True, skip_apt_update=True),
     # The container gets stuck while running get-deps, so disable for now
     Target(container="ubuntu:20.04", continuous_only=True),
     # debian 8's wayland libraries are too old for wayland-client