Add EnvironmentMetrics schema

Based on DSP8010_2022.2 and adds the EnvironmentMetrics schema.

Tested: built bmcweb successfully and validator passes

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I994b48c544edc22a6bf99187b536f3e51e10b052
diff --git a/scripts/update_schemas.py b/scripts/update_schemas.py
index 18c99b7..f0d70b8 100755
--- a/scripts/update_schemas.py
+++ b/scripts/update_schemas.py
@@ -43,6 +43,7 @@
     "ComputerSystemCollection",
     "Drive",
     "DriveCollection",
+    'EnvironmentMetrics',
     "EthernetInterface",
     "EthernetInterfaceCollection",
     "Event",