Use a generic function to access the home directory making macOS path
access match other Unix systems.
When the function was added [0] it solved access to HOME when the
environment variable wasn't set. Since then support for `getpwuid()`
has been added on UNIX systems [1], which also works on macOS,
removing the need for macOS to have a separate function.
Furthermore BLI_expand_tilde had undocumented limitations that didn't
apply to other platforms (see PR for details).
Ref !128734
[0]: 9df13fba69
[1]: 6039cb17e6
This was located in BKE_appdir which is higher level
(used for accessing Blender's paths), where as the home directory
may be accessed from lower level path code.
The delay is caused by `Shortcut->Resolve(0, SLR_NO_UI | SLR_UPDATE)`
to locate potentially moved or renamed paths.
The issue was resolved by adding the `SLR_NOSEARCH` flag.
This eliminates the delay without sacrificing functionality.
Pull Request: https://projects.blender.org/blender/blender/pulls/116692
Workaround potential C-API `FILE` incompatibility by reading the
file data into memory, compiling & running it - matching existing logic
for text buffers text buffers. This replaces the in-lined stub-script
that re-opened the file from Python.
While the down-side of the stub-script was minor, it required some
non-obvious logic and had the disadvantage of requiring 2x scripts to
execute whenever a file was executed on WIN32.
Expose BLI_file_read_data_as_mem_from_handle as a public function
since it's useful to be able to read an existing FILE into memory.
