Release v2.1.0 on 2023-05-10

Combined Changes Below are Non-Zero-Diff

• v11.0.0-rc.1 20230316 updates by @sdrabenh in #728
• Additional updates for GCM v11.0.0-rc.1 by @sdrabenh in #732
• Mar 31 updates for GCM v11.0.0-rc.1 by @sdrabenh in #734
• Enable coupled run test by @mathomp4 in #737
• Add pull request template by @mathomp4 in #739
• Merge tag hwt_v03 changes into v11.0.0-rc1 by @sdrabenh in #742
• Pull in tag hwt_v04 updates into develop by @sdrabenh in #745
• Auto-conversion updates for gfdl_cloud_microphys.F90 by @sdrabenh in #748

Full Changelog: v2.0.0...v2.1.0