Extend deep scanning histograms time until expiration

This changes the following histograms' expiration to 2022-02-01:

SafeBrowsing.DeepScan.Upload.*
SafeBrowsing.DeepScan.Paste.*
SafeBrowsing.DeepScan.DragAndDrop.*
SafeBrowsing.DeepScan.Download.*
Enterprise.OnBulkDataEntry.DataSize.*

The volume of data for deep scans is expected to increase during 2021
so keeping these histograms for longer will acquire useful data.

Change-Id: I2cbc3b678b065d6518a6009d0cad6eb211a8ff21
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2622279Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Dominique Fauteux-Chapleau <domfc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842541}

tools/metrics/histograms/histograms_xml/enterprise/histograms.xml

@@ -948,7 +948,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Enterprise.OnBulkDataEntry.DataSize" units="bytes"
-    expires_after="M90">
+    expires_after="2022-02-01">
   <owner>domfc@chromium.org</owner>
   <owner>webprotect-team@google.com</owner>
   <summary>