AMReX/pyAMReX/PICSAR: weekly update (#5445)

- Weekly update to latest AMReX:
```console
./Tools/Release/updateAMReX.py
```
- Weekly update to latest pyAMReX (no changes):
```console
./Tools/Release/updatepyAMReX.py
```
- Weekly update to latest PICSAR (no changes):
```console
./Tools/Release/updatePICSAR.py
```

Slightly off schedule to merge a bug fix from AMReX.

.github/workflows/cuda.yml

@@ -137,7 +137,7 @@ jobs:
         which nvcc || echo "nvcc not in PATH!"
 
         git clone https://github.com/AMReX-Codes/amrex.git ../amrex
-        cd ../amrex && git checkout --detach 24.11 && cd -
+        cd ../amrex && git checkout --detach 4b703fec6c2ff983e465c8cef0cc4947231edb07 && cd -
         make COMP=gcc QED=FALSE USE_MPI=TRUE USE_GPU=TRUE USE_OMP=FALSE USE_FFT=TRUE USE_CCACHE=TRUE -j 4
 
         ccache -s

cmake/dependencies/AMReX.cmake

@@ -283,7 +283,7 @@ set(WarpX_amrex_src ""
 set(WarpX_amrex_repo "https://github.com/AMReX-Codes/amrex.git"
     CACHE STRING
     "Repository URI to pull and build AMReX from if(WarpX_amrex_internal)")
-set(WarpX_amrex_branch "24.11"
+set(WarpX_amrex_branch "4b703fec6c2ff983e465c8cef0cc4947231edb07"
     CACHE STRING
     "Repository branch for WarpX_amrex_repo if(WarpX_amrex_internal)")