[pdq] Fix pdq CI failure caused by ubuntu-latest 22.04 --> 24.04 update

[ianwal]

Summary

Fix pdq CI test failure on Ubuntu 24.04 (#1757 for pdq only)

imagemagick isn't installed by Ubuntu 24.04 by default anymore, and it's a runtime dependency of CImg for decoding images. Installing it fixes the issue.

Changes

• Install imagemagick before building pdq

  • This is the ONLY required change to get the build working.

• Added multiple OS profiles to the CI to make it easier to spot a failure caused by OS differences in the future.

  • The only thing I had to debug this issue with was this runtime message: [CImg] *** CImgIOException *** [instance(0,0,0,0,(nil),non-shared)] CImg<unsigned char>::load(): Failed to recognize format of file './reg_test/../../data/reg-test-input/dih/bridge-1-original.jpg'. It would have been very helpful to be able to see the failure was only occurring on one profile but not the other.

• Updated checkout action from v2 to v4

Test Plan

CI should fail without the changes (first commit).

After the changes, CI should pass on both 22.04 and 24.04.

[Dcallies]

Many thanks!