Enable builds on RHEL 8.x

Author: alcaeus

.evergreen/config.yml

@@ -1139,13 +1139,18 @@ axes:
       - id: rhel90
         display_name: "RHEL 9.0"
         run_on: rhel90-small
-      # TODO: RHEL 8.x is not working yet
-      # - id: rhel82-arm64
-      #   display_name: "RHEL 8.2 ARM64"
-      #   run_on: rhel82-arm64-small
-      # - id: rhel80
-      #   display_name: "RHEL 8.0"
-      #   run_on: rhel80-small
+      - id: rhel83-zseries
+        display_name: "RHEL 8.3 Zseries"
+        run_on: rhel83-zseries-small
+      - id: rhel82-arm64
+        display_name: "RHEL 8.2 ARM64"
+        run_on: rhel82-arm64-small
+      - id: rhel81-power8
+        display_name: "RHEL 8.1 Power8"
+        run_on: rhel81-power8-large
+      - id: rhel80
+        display_name: "RHEL 8.0"
+        run_on: rhel80-small
       - id: rhel76
         display_name: "RHEL 7.6"
         run_on: rhel76-small
@@ -1209,16 +1214,17 @@ axes:
 
 
 buildvariants:
-# Test all PHP versions with latest-stable MongoDB on Debian 11, Debian 10, RHEL 8.0, Ubuntu 20.04
+# Test all PHP versions with latest-stable MongoDB on all operating systems
 - matrix_name: "test-php-versions"
   matrix_spec:
     os:
     - debian11
     - debian10
     - rhel90
-    # TODO: RHEL 8.x is not working yet
-    # - rhel82-arm64
-    # - rhel80
+    - rhel83-zseries
+    - rhel82-arm64
+    - rhel81-power8
+    - rhel80
     - rhel76
     - ubuntu2204-arm64
     - ubuntu2204