[#1060] blobstor: allow to disable compression based on content-type

For some data compression makes little sense, as it is already compressed.
This commit allows to leave such data unchanged based on `Content-Type`
attribute. Currently exact, prefix and suffix matching are supported.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

pkg/local_object_storage/blobstor/iterate_test.go

@@ -66,7 +66,7 @@ func TestIterateObjects(t *testing.T) {
 	}
 
 	for _, v := range mObjs {
-		_, err := blobStor.PutRaw(v.addr, v.data)
+		_, err := blobStor.PutRaw(v.addr, v.data, true)
 		require.NoError(t, err)
 	}