Merge branch 'release-3.15'

Status Job ID Name Coverage
  External
passed cmake-hythloth-linux-debug-makefiles+sphinx

passed cmake-minoc-linux-release-lint-iwyu-tidy

passed cmake-moonshade-osx-debug-ninja

passed cmake-moonshade-osx-release-makefiles

passed cmake-terfin-windows-release-vs2019

passed cmake-hythloth-linux-debug-makefiles+sphinx

00:47:30

passed cmake-minoc-linux-release-lint-iwyu-tidy

00:13:41

passed cmake-moonshade-osx-debug-ninja

00:11:44

passed cmake-moonshade-osx-release-makefiles

00:13:39

passed cmake-terfin-windows-release-vs2019

00:48:06