.github/workflows, playbooks: Unbreak 'go mod download'

Currently, the CI is failing because 'go mod download' is encountering an
expired TLS certificate:
  $ go mod download
  go: github.com/spf13/viper@v1.10.1 requires
      go.opencensus.io@v0.23.0: unrecognized import path "go.opencensus.io":
        https fetch: Get "https://go.opencensus.io/?go-get=1": tls: failed to
        verify certificate: x509: certificate has expired or is not yet valid:
        current time 2025-01-23T17:00:16+01:00 is after 2025-01-21T03:43:04Z

Therefore, disable the TLS certificate check until the certificate gets
updated or the dependency gets removed [1].

[1] https://pkg.go.dev/cmd/go#hdr-Environment_variables

https://github.com/containers/toolbox/pull/1611

.github/workflows/ubuntu-tests.yaml

@@ -126,6 +126,8 @@ jobs:
 
       - name: Download Go modules
         run: go mod download -x
+        env:
+          GOINSECURE: go.opencensus.io
         working-directory: containers/toolbox/src
 
       - name: Set up build directory

playbooks/dependencies-centos-9-stream.yaml

@@ -40,6 +40,8 @@
 
 - name: Download Go modules
   command: go mod download -x
+  environment:
+    GOINSECURE: go.opencensus.io
   args:
     chdir: '{{ zuul.project.src_dir }}/src'
 

playbooks/dependencies-fedora-restricted.yaml

@@ -67,6 +67,8 @@
 
 - name: Download Go modules
   command: go mod download -x
+  environment:
+    GOINSECURE: go.opencensus.io
   args:
     chdir: '{{ zuul.project.src_dir }}/src'
 

playbooks/dependencies-fedora.yaml

@@ -41,6 +41,8 @@
 
 - name: Download Go modules
   command: go mod download -x
+  environment:
+    GOINSECURE: go.opencensus.io
   args:
     chdir: '{{ zuul.project.src_dir }}/src'