Revert "Temporarily disable openBSD in testing (#222)" (#228)

This reverts commit 13432b5.

Author: taiki-e

.cirrus.yml

@@ -45,18 +45,17 @@ netbsd_task:
     - . $HOME/.cargo/env
     - cargo test
 
-# Temporarily disabled because openBSD 7.5 is EoL, waiting for an update.
-#openbsd_task:
-#  name: test ($TARGET)
-#  compute_engine_instance:
-#    image_project: pg-ci-images
-#    # https://github.com/anarazel/pg-vm-images/blob/main/packer/openbsd.pkrvars.hcl
-#    image: family/pg-ci-openbsd-vanilla
-#    platform: openbsd
-#  env:
-#    TARGET: x86_64-unknown-openbsd
-#  setup_script:
-#    # OpenBSD is tier 3 target, so install rust from package manager instead of rustup
-#    - pkg_add git rust
-#  test_script:
-#    - cargo test
+openbsd_task:
+  name: test ($TARGET)
+  compute_engine_instance:
+    image_project: pg-ci-images
+    # https://github.com/anarazel/pg-vm-images/blob/main/packer/openbsd.pkrvars.hcl
+    image: family/pg-ci-openbsd-vanilla
+    platform: openbsd
+  env:
+    TARGET: x86_64-unknown-openbsd
+  setup_script:
+    # OpenBSD is tier 3 target, so install rust from package manager instead of rustup
+    - pkg_add git rust
+  test_script:
+    - cargo test