Deprecate c headers

[CursedRock17]

Related to this pull request in geometry2 in which we deprecated the .h style headers in favor of .hpp.

[jonbinney]

@CursedRock17 looks like tests are failing

[CursedRock17]

I should mention this is meant to be a preemptive PR for if/when the related pull request gets approved. I'm also working on a backport so there won't be distribution issues.

[CursedRock17]

With the recent backports merged, this PR should be good for review.

[ahcorde]

Hi @jonbinney, when you merge this PR, do you mind to create a new release on rolling ?

[jonbinney]

Will do - i'll take a look this weekend.

[jonbinney]

Looks like tests are still failing.... when did the hpp headers get added to tf2?

[jonbinney]

It looks like the changes to the tf2 package got released, but aren't yet in the docker containers used by the CI.

[jonbinney]

Yeah, even in the rolling container only tf2 version 0.38.2 is included

root@ec5d52105e46:/# apt policy ros-rolling-tf2
ros-rolling-tf2:
  Installed: 0.38.2-1noble.20240919.213053
  Candidate: 0.38.2-1noble.20240919.213053
  Version table:
 *** 0.38.2-1noble.20240919.213053 100
        100 /var/lib/dpkg/status

We could update CI to apt upgrade before running, but I'd rather wait and merge this PR after the docker images get updated.