PYTHON-5611 Fix python binary usage for Other Hosts (#2586)

.evergreen/generated_configs/variants.yml

@@ -9,9 +9,9 @@ buildvariants:
     batchtime: 1440
     expansions:
       VERSION: latest
-      PYTHON_BINARY: /usr/bin/python3.11
       NO_EXT: "1"
       REQUIRE_FIPS: "1"
+      PYTHON_BINARY: /usr/bin/python3.11
     tags: []
   - name: other-hosts-rhel8-zseries-latest
     tasks:
@@ -22,7 +22,6 @@ buildvariants:
     batchtime: 1440
     expansions:
       VERSION: latest
-      PYTHON_BINARY: /usr/bin/python3.11
       NO_EXT: "1"
     tags: []
   - name: other-hosts-rhel8-power8-latest
@@ -34,7 +33,6 @@ buildvariants:
     batchtime: 1440
     expansions:
       VERSION: latest
-      PYTHON_BINARY: /usr/bin/python3.11
       NO_EXT: "1"
     tags: []
   - name: other-hosts-rhel8-arm64-latest
@@ -46,7 +44,6 @@ buildvariants:
     batchtime: 1440
     expansions:
       VERSION: latest
-      PYTHON_BINARY: /usr/bin/python3.11
       NO_EXT: "1"
     tags: []
   - name: other-hosts-amazon2023-latest
@@ -58,7 +55,6 @@ buildvariants:
     batchtime: 1440
     expansions:
       VERSION: latest
-      PYTHON_BINARY: /usr/bin/python3.11
       NO_EXT: "1"
     tags: [pr]
 

.evergreen/scripts/generate_config.py

@@ -470,13 +470,14 @@ def create_alternative_hosts_variants():
 
     version = "latest"
     for host_name in OTHER_HOSTS:
-        # Use explicit Python 3.11 binary on the host since the default python3 is 3.9.
-        expansions = dict(VERSION="latest", PYTHON_BINARY="/usr/bin/python3.11")
+        expansions = dict(VERSION="latest")
         handle_c_ext(C_EXTS[0], expansions)
         host = HOSTS[host_name]
         tags = []
         if "fips" in host_name.lower():
             expansions["REQUIRE_FIPS"] = "1"
+            # Use explicit Python 3.11 binary on the host since the default python3 is 3.9.
+            expansions["PYTHON_BINARY"] = "/usr/bin/python3.11"
         if "amazon" in host_name.lower():
             tags.append("pr")
         variants.append(