Add DIR_METADATA files to //sql

Generate DIR_METADATA files and remove metadata from OWNERS files for //sql.

Bug: 1113033
Change-Id: I7fa2ca83ea5d961bea8d257c4919b035f9e6fe6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2451394
Commit-Queue: Victor Costan <pwnall@chromium.org>
Auto-Submit: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814297}

sql/DIR_METADATA

+# Metadata information for this directory.
+#
+# For more information on DIR_METADATA files, see:
+#   https://source.chromium.org/chromium/infra/infra/+/master:go/src/infra/tools/dirmd/README.md
+#
+# For the schema of this file, see Metadata message:
+#   https://source.chromium.org/chromium/infra/infra/+/master:go/src/infra/tools/dirmd/proto/dir_metadata.proto
+
+monorail {
+  component: "Internals>Storage"
+}
+team_email: "storage-dev@chromium.org"
\ No newline at end of file

sql/OWNERS

@@ -3,6 +3,3 @@ pwnall@chromium.org
 
 # Secondary:
 cmumford@google.com
-
-# TEAM: storage-dev@chromium.org
-# COMPONENT: Internals>Storage