Downstream build errors with head

I'm trying to build colmap with the newest ceres version and it appears to me, that something is misconfigured.

for ceres, i dit the following:
```
git clone git@github.com:ceres-solver/ceres-solver.git --recursive ceres
cd ceres && mkdir build && cd build

cmake .. -GNinja -DCMAKE_INSTALL_PREFIX=$HOME/bin/ceres
ninja && ninja install
```

for colmapp i did the following
```
git clone https://github.com/colmap/colmap --recursive
cd colmap && mkdir build && cd build

cmake .. -GNinja -DCMAKE_PREFIX_PATH=$HOME/bin/ceres -DCMAKE_CUDA_ARCHITECTURES=native -DCMAKE_INSTALL_PREFIX=$HOME/bin/colma
```

at this point i get a cmake error:
```
CMake Error at /usr/share/cmake-3.25/Modules/CMakeFindDependencyMacro.cmake:47 (find_package):
  Found package configuration file:

    /home/madam/bin/ceres/lib/cmake/absl/abslConfig.cmake

  but it set absl_FOUND to FALSE so package "absl" is considered to be NOT
  FOUND.  Reason given by package:

  The following imported targets are referenced, but are missing:
  GTest::gmock

Call Stack (most recent call first):
  /home/madam/bin/ceres/lib/cmake/Ceres/CeresConfig.cmake:199 (find_dependency)
  cmake/FindDependencies.cmake:41 (find_package)
  CMakeLists.txt:116 (include)
```

I'm not completely certain this is a ceres issue, but given the recent cmake refactoring i ifigured it might :)
I'm on debian 12 bookworm.

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