Tests/JBIG2: Add test images for non-0 templates

Produced by this shell script:

```sh
S=Tests/LibGfx/test-inputs/bmp/bitmap.bmp
J=$HOME/Downloads/T-REC-T.88-201808-I\!\!SOFT-ZST-E/Software
J=$J/JBIG2_SampleSoftware-A20180829/source/jbig2

for t in template1 template1-tpgdon \
         template2 template2-tpgdon \
         template3 template3-tpgdon; do
  echo $t.ini
  cat $t.ini
  echo
  $J -i "${S%.bmp}" -f bmp -o bitmap-$t -F jb2 -ini $t.ini
  echo
done
```

Producing this output:

```sh
% ./make-templates.sh
template1.ini
-Gen -Seg 1
-Gen -Param -Template 1
-Gen -Param -ATX1 3
-Gen -Param -ATY1 -1

ENC Start ===>complete

template1-tpgdon.ini
-Gen -Seg 1
-Gen -Param -Template 1
-Gen -Param -ATX1 3
-Gen -Param -ATY1 -1
-Gen -Param -TpGDon 1

ENC Start ===>complete

template2.ini
-Gen -Seg 1
-Gen -Param -Template 2
-Gen -Param -TpGDon 1
-Gen -Param -ATX1 2
-Gen -Param -ATY1 -1

ENC Start ===>complete

template2-tpgdon.ini
-Gen -Seg 1
-Gen -Param -Template 2
-Gen -Param -ATX1 2
-Gen -Param -ATY1 -1
-Gen -Param -TpGDon 1

ENC Start ===>complete

template3.ini
-Gen -Seg 1
-Gen -Param -Template 3
-Gen -Param -ATX1 2
-Gen -Param -ATY1 -1

ENC Start ===>complete

template3-tpgdon.ini
-Gen -Seg 1
-Gen -Param -Template 3
-Gen -Param -ATX1 2
-Gen -Param -ATY1 -1
-Gen -Param -TpGDon 1

ENC Start ===>complete
```

`jbig2` still has the local patch mentioned in #23608 to make it write
correct TPGDON data.