PHPLIB-1023: Provide OS variant when building mongohoused (#997)

* PHPLIB-1023: Provide OS variant when building mongohoused

This resolves error with our go config

* Update .evergreen/config.yml

Co-authored-by: Jeremy Mikola <jmikola@gmail.com>

Co-authored-by: Jeremy Mikola <jmikola@gmail.com>

Author: alcaeus

.evergreen/config.yml

@@ -192,7 +192,7 @@ functions:
     - command: shell.exec
       params:
         script: |
-          DRIVERS_TOOLS="${DRIVERS_TOOLS}" sh ${DRIVERS_TOOLS}/.evergreen/atlas_data_lake/build-mongohouse-local.sh
+          VARIANT=${VARIANT} DRIVERS_TOOLS="${DRIVERS_TOOLS}" sh ${DRIVERS_TOOLS}/.evergreen/atlas_data_lake/build-mongohouse-local.sh
     - command: shell.exec
       params:
         background: true
@@ -834,6 +834,8 @@ buildvariants:
   matrix_spec: { "php-edge-versions": "latest-stable", "driver-versions": "latest-stable" }
   display_name: "Atlas Data Lake"
   run_on: debian11
+  expansions:
+     VARIANT: debian11 # Referenced by ADL build script for downloading MQLRun
   tasks:
     - name: "test-atlas-data-lake"