playbooks: Highlight failures from 'meson compile' and 'meson install'

Currently, 'meson compile' and 'meson install' were being invoked from
pre-run playbooks.  This meant that a genuine build failure from either
of those commands would be shown as a RETRY_LIMIT failure by the CI.

This was misleading.  It made it look as if the failure was caused by
some transient networking problem or that the CI node was too slow due
to momentary heavy load, whereas the failure was actually due to a
problem in the Toolbx sources.  A genuine problem in the sources should
be reflected as a FAILURE, not RETRY_LIMIT.

However, it's worth noting that 'meson compile' invokes 'go build',
which downloads all the Go modules required by the Toolbx sources.  This
is worth retaining in the pre-run playbooks since it primarily depends
on Internet infrastructure beyond the Toolbx sources.

As a nice side-effect, the CI no longer gets mysteriously stuck like
this while the Go modules are being downloaded:
  TASK [Build Toolbox]
  ci-node-36 | ninja: Entering directory
    `/home/zuul-worker/src/github.com/containers/toolbox/builddir'
  ...
  ci-node-36 | [8/13] Generating doc/toolbox-rmi.1 with a custom command
  ci-node-36 | [9/13] Generating doc/toolbox-run.1 with a custom command
  ci-node-36 | [10/13] Generating doc/toolbox.conf.5 with a custom
    command
  ci-node-36 | [11/13] Generating src/toolbox with a custom command

https://github.com/containers/toolbox/pull/1158

playbooks/dependencies.yaml

@@ -18,6 +18,12 @@
       - systemd
       - udisks2
 
+- name: Download Go modules
+  shell: |
+    go mod download -x
+  args:
+    chdir: '{{ zuul.project.src_dir }}/src'
+
 - name: Setup submodules
   shell: |
     git submodule init

playbooks/setup-env-migration-path-for-coreos-toolbox.yaml

@@ -7,5 +7,3 @@
       command: meson -Dmigration_path_for_coreos_toolbox=true --fatal-meson-warnings builddir
       args:
         chdir: '{{ zuul.project.src_dir }}'
-
-    - include_tasks: build.yaml

playbooks/setup-env.yaml

@@ -7,5 +7,3 @@
       command: meson setup --fatal-meson-warnings builddir
       args:
         chdir: '{{ zuul.project.src_dir }}'
-
-    - include_tasks: build.yaml

playbooks/system-test.yaml

@@ -1,6 +1,8 @@
 ---
 - hosts: all
   tasks:
+    - include_tasks: build.yaml
+
     - name: Run system tests
       command: bats --timing ./test/system
       environment:

playbooks/unit-test.yaml

@@ -1,6 +1,8 @@
 ---
 - hosts: all
   tasks:
+    - include_tasks: build.yaml
+
     - name: Test
       command: meson test -C builddir
       args: