cmake: accommodate for `UNIT_TEST_SOURCES` #5834

Failed to save: <h2>Our services aren't available right now</h2><p>We're working to restore all services as soon as possible. Please check back soon.</p>0geaQaAAAAADXZOZyUN+hQpEtzxljnQ+aUEFPRURHRTA2MTcARWRnZQ==

win+VS build (x64)

Failed to restore: Cache service responded with 400

win+VS build (arm64)

Failed to save: <h2>Our services aren't available right now</h2><p>We're working to restore all services as soon as possible. Please check back soon.</p>0g+aQaAAAAABifnvXaB72T6Vh896YvDCVRE0yRURHRTA3MTAARWRnZQ==

win+VS build (arm64)

Failed to restore: Cache service responded with 400

linux-musl-meson (alpine:latest)

JGit wasn't installed, see above for clues why

linux-musl-meson (alpine:latest)

git-lfs wasn't installed, see above for clues why

linux-musl-meson (alpine:latest)

perforce wasn't installed, see above for clues why

almalinux-8 (almalinux:8)

JGit wasn't installed, see above for clues why

almalinux-8 (almalinux:8)

git-lfs wasn't installed, see above for clues why

almalinux-8 (almalinux:8)

perforce wasn't installed, see above for clues why

debian-11 (debian:11)

JGit wasn't installed, see above for clues why

debian-11 (debian:11)

git-lfs wasn't installed, see above for clues why

debian-11 (debian:11)

perforce wasn't installed, see above for clues why

win+Meson test (9)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

win+Meson test (7)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

linux32 (i386/ubuntu:focal)

JGit wasn't installed, see above for clues why

linux32 (i386/ubuntu:focal)

git-lfs wasn't installed, see above for clues why

linux32 (i386/ubuntu:focal)

perforce wasn't installed, see above for clues why

win+Meson test (0)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

win+Meson test (5)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

win+Meson test (4)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

win+Meson test (2)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

win+Meson test (6)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

win+Meson test (1)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

win+Meson test (8)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

win+Meson test (3)

The `python-version` input is not set. The version of Python currently in `PATH` will be used.

osx-clang (macos-13)

JGit wasn't installed, see above for clues why

osx-clang (macos-13)

Already linked: /usr/local/Cellar/gettext/0.26

osx-gcc (macos-13)

JGit wasn't installed, see above for clues why

osx-gcc (macos-13)

Already linked: /usr/local/Cellar/gettext/0.26

osx-meson (macos-13)

JGit wasn't installed, see above for clues why

osx-meson (macos-13)

pcre2 10.45 is already installed and up-to-date. To reinstall 10.45, run: brew reinstall pcre2

osx-meson (macos-13)

ninja 1.13.1 is already installed and up-to-date. To reinstall 1.13.1, run: brew reinstall ninja

osx-meson (macos-13)

Already linked: /usr/local/Cellar/gettext/0.26

osx-reftable (macos-13)

JGit wasn't installed, see above for clues why

osx-reftable (macos-13)

Already linked: /usr/local/Cellar/gettext/0.26

win+Meson build