Remove IPE compression config from deb10 nightly job

This should fix #23487 (closed), as it modifies CI to avoid passing the --enable-ipe-data-compression configure flag for debian 10 nightly jobs. The --enable-ipe-data-compression flag will still be passed to validate CI jobs for merge requests that have the IPE label.

This also fixes warnings due to incompatible pointer types in IPE.c.

I can also wait to make these changes until !10602 (closed) is in, in which case I will squash all of the IPE compression commits, including these, and create a new MR.