[FEATURE] New icon for EXT: reports backend module

Brings a brand new icon for Reports extension & backend module.

Since Reports and Log backend modules had exactly the same icon
this change brings an usability improvement for all users.

Change-Id: Ieeb868bdf1cba4aaaae0e833b9377ce663352237
Resolves: #41631
Releases: 6.2
Reviewed-on: https://review.typo3.org/20504
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer