Added mongodb/specifications as a git submodule

Set the specifications submodule to last schemaVersion 1.21 commit
Deleted old copied json tests.
Updated test runners to use the new submodule locations
Added skips for any tests that haven't been implemented

JAVA-5821

Author: rozza

.evergreen/.evg.yml

@@ -31,6 +31,12 @@ functions:
     # Applies the subitted patch, if any
     # Deprecated. Should be removed. But still needed for certain agents (ZAP)
     - command: git.apply_patch
+    # Fetch the specifications submodule
+    - command: shell.exec
+      params:
+        working_dir: "src"
+        script: |
+          git submodule update --init
     # Make an evergreen expansion file with dynamic values
     - command: shell.exec
       params:

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "specifications"]
+	path = driver-core/src/test/resources/specifications
+	url = https://github.com/mongodb/specifications