Update multiple enterprise uma metrics expire date

Enterprise.MachineLevelUserCloudPolicyEnrollment.* are now expired in
June.
Enterprise.CloudReporting* are set to expired in 1 year.
Enterprise.CloudExtensionRequestUpdated expire date is bumped to Oct.

Bug: 1160729, 1160730
Change-Id: I2c245f4a68e5c05a99a4255685eccb1e7ca253bd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2613464Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841114}

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

@@ -268,7 +268,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Enterprise.CloudExtensionRequestUpdated"
-    enum="EnterpriseCloudExtensionRequestListUpdate" expires_after="2021-02-01">
+    enum="EnterpriseCloudExtensionRequestListUpdate" expires_after="2021-10-01">
   <owner>zmin@chromium.org</owner>
   <owner>src/chrome/browser/enterprise/reporting/OWNERS</owner>
   <summary>
@@ -290,7 +290,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Enterprise.CloudReportingRequestCount" units="requests"
-    expires_after="2021-04-04">
+    expires_after="2021-02-01">
   <owner>zmin@chromium.org</owner>
   <owner>pastarmovj@chromium.org</owner>
   <summary>
@@ -310,7 +310,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Enterprise.CloudReportingResponse"
-    enum="EnterpriseCloudReportingResponse" expires_after="2021-06-06">
+    enum="EnterpriseCloudReportingResponse" expires_after="2021-02-01">
   <owner>zmin@chromium.org</owner>
   <owner>pastarmovj@chromium.org</owner>
   <summary>
@@ -885,7 +885,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 
 <histogram
     name="Enterprise.MachineLevelUserCloudPolicyEnrollment.RequestFailureTime"
-    units="ms" expires_after="2021-05-02">
+    units="ms" expires_after="2021-06-01">
   <owner>rogerta@chromium.org</owner>
   <owner>zmin@chromium.org</owner>
   <summary>
@@ -896,7 +896,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 
 <histogram
     name="Enterprise.MachineLevelUserCloudPolicyEnrollment.RequestSuccessTime"
-    units="ms" expires_after="2021-02-01">
+    units="ms" expires_after="2021-06-01">
   <owner>rogerta@chromium.org</owner>
   <owner>zmin@chromium.org</owner>
   <summary>
@@ -907,7 +907,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 
 <histogram name="Enterprise.MachineLevelUserCloudPolicyEnrollment.Result"
     enum="MachineLevelUserCloudPolicyEnrollmentResult"
-    expires_after="2021-06-06">
+    expires_after="2021-06-01">
   <owner>rogerta@chromium.org</owner>
   <owner>zmin@chromium.org</owner>
   <summary>The result of machine level user cloud policy enrollment.</summary>
@@ -916,7 +916,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 <histogram
     name="Enterprise.MachineLevelUserCloudPolicyEnrollment.StartupDialog"
     enum="MachineLevelUserCloudPolicyEnrollmentStartupDialog"
-    expires_after="2021-02-01">
+    expires_after="2021-06-01">
   <owner>rogerta@chromium.org</owner>
   <owner>zmin@chromium.org</owner>
   <summary>
@@ -927,7 +927,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 
 <histogram
     name="Enterprise.MachineLevelUserCloudPolicyEnrollment.StartupDialogTime"
-    units="ms" expires_after="2021-02-01">
+    units="ms" expires_after="2021-06-01">
   <owner>rogerta@chromium.org</owner>
   <owner>zmin@chromium.org</owner>
   <summary>
@@ -938,7 +938,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 
 <histogram
     name="Enterprise.MachineLevelUserCloudPolicyEnrollment.UnenrollSuccess"
-    enum="BooleanSuccess" expires_after="2021-02-07">
+    enum="BooleanSuccess" expires_after="2021-06-01">
   <owner>domfc@chromium.org</owner>
   <owner>zmin@chromium.org</owner>
   <summary>