Doc: Add info about automatic crash reporting

- Sentry sets a file size limit for crash reports
- Users are not notified about sending reports or whether
  it succeeds or fails
- Describe the location of the reports
- Add a note encouraging users to still report crashes in JIRA

Fixes: QTCREATORBUG-32061
Change-Id: I1a5ca5f24463cbad846d55f279f4bd02ec1d61ad
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

doc/qtcreator/src/howto/creator-only/creator-how-to-turn-on-crash-reports.qdoc

@@ -24,6 +24,20 @@
         \li Select \uicontrol {Enable crash reporting}.
     \endlist
 
+    Crash reports are sent automatically if they don't exceed the file size
+    limit that Sentry sets for accepting them. You are not notified about
+    sending the reports or whether it succeeded or failed.
+
+    \section1 Clear local crash reports
+
+    \QC stores crash reports on the computer in the following directories:
+
+    \list
+        \li On Windows: \c {%APPDATA%\QtProject\qtcreator\crashpad_reports}
+        \li On Linux and \macos:
+            \c {$HOME/.config/QtProject/qtcreator/crashpad_reports}
+    \endlist
+
     To free up disk space that crash reports reserve on the computer,
     select \uicontrol {Clear Local Crash Reports}. You can see the
     size of the crash reports next to the button.
@@ -31,5 +45,8 @@
     Select \uicontrol ? to view more information about Crashpad and the security
     policy.
 
+    \note The best way to report a crash is to create a bug report and attach a
+    \e .dmp file or paste the corresponding stack trace to the report.
+
     \sa {Contact Qt}
 */