Revert "Revert "Test FLE via docker (mongodb#2395)""

This reverts commit 8b3bc29.

Author: p

.evergreen/config/common.yml.erb

@@ -554,6 +554,10 @@ tasks:
     commands:
       - func: "export FLE credentials"
       - func: "run tests"
+  - name: "test-fle-via-docker"
+    commands:
+      - func: "export FLE credentials"
+      - func: "run tests via docker"
   - name: "test-aws-auth"
     commands:
       - func: "export AWS auth credentials"

.evergreen/config/standard.yml.erb

@@ -444,7 +444,7 @@ buildvariants:
       fle: fle
     display_name: "FLE: ${mongodb-version} ${ruby}"
     tasks:
-      - name: "test-fle"
+      - name: "test-fle-via-docker"
 
   - matrix_name: "fle-4.2"
     matrix_spec: