[311] fix PI

Squashed commit of the following:

commit 1d88320d4ba6efecb6fa189d167ed27a9bc226b0
Author: Don Shea <don.shea@nasa.gov>
Date:   Fri Feb 14 20:33:57 2025 +0000

    clean up a bunch more PI and RADEG

commit d4d0826b0e4103d13a4d639f8be50e30050c20db
Merge: 1c67899c 4ac9e0cb
Author: Don Shea <don.shea@nasa.gov>
Date:   Fri Feb 14 02:05:33 2025 +0000

    Merge branch 'develop' into 311-fix-pi

commit 1c67899c
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Tue Jan 7 15:13:04 2025 -0500

    [311][genutils] Defined OEL_DEGRAD

commit 0182e5d9
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Tue Jan 7 09:59:02 2025 -0500

    [311][genutils] Added OEL_DEGRAD

commit 89b29563
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Mon Dec 9 08:26:30 2024 -0500

    [311][genutils] Changed G_ to OEL_

commit c790a33d
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Fri Dec 6 09:26:12 2024 -0500

    [311][libgenutils] Fixed an issue with complex usage of G_RADEG

commit 224dc8e6
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Fri Dec 6 08:43:59 2024 -0500

    [311][libgenutils] Fixed an issue with the definition of G_RADEG

commit 5d889083
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Fri Dec 6 08:36:41 2024 -0500

    [311][libgenutils] Added definition of Pi

commit fa369cca
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Fri Dec 6 08:35:03 2024 -0500

    [311][libgenutils] Defined radeg and pi