feat(PHP agent): Add CLM metadata env vars

src/content/docs/apm/agents/php-agent/configuration/php-agent-configuration.mdx

@@ -3571,6 +3571,94 @@ This section lists the settings that affect the reporting of code level metrics.
     </Callout>
 
   </Collapser>
+
+  <Collapser
+    id="NEW_RELIC_METADATA_COMMIT"
+    title="NEW_RELIC_METADATA_COMMIT"
+  >
+    <Callout variant="important">
+      This can only be set through an environment variable.
+    </Callout>
+    <table>
+      <tbody>
+        <tr>
+          <th>
+            Type
+          </th>
+
+          <td>
+            Integer
+          </td>
+        </tr>
+
+        <tr>
+          <th>
+            Default
+          </th>
+
+          <td>
+            `None`
+          </td>
+        </tr>
+
+        <tr>
+          <th>
+            [Set in](#options)
+          </th>
+
+          <td>
+            Environment variable
+          </td>
+        </tr>
+      </tbody>
+    </table>
+
+    The commit sha. The entire sha can be used or just the first seven characters (e.g., 734713b).
+  </Collapser>
+
+  <Collapser
+    id="NEW_RELIC_METADATA_RELEASE_TAG"
+    title="NEW_RELIC_METADATA_RELEASE_TAG"
+  >
+    <Callout variant="important">
+      This can only be set through an environment variable.
+    </Callout>
+    <table>
+      <tbody>
+        <tr>
+          <th>
+            Type
+          </th>
+
+          <td>
+            String
+          </td>
+        </tr>
+
+        <tr>
+          <th>
+            Default
+          </th>
+
+          <td>
+            `None`
+          </td>
+        </tr>
+
+        <tr>
+          <th>
+            [Set in](#options)
+          </th>
+
+          <td>
+            Environment variable
+          </td>
+        </tr>
+      </tbody>
+    </table>
+
+    A release tag (such as v0.1.209 or release-209).
+  </Collapser>  
 </CollapserGroup>