find libpython for uv threaded python venvs

[sounkou-bioinfo]

No description provided.

[sounkou-bioinfo]

This should not be merged,
There is a segfault when using threaded python. This pull request modifies the libpython finding regex

echo ================ Non threaded python =================
UV_VENV_CLEAR=1 uv venv --python  python@3.14
uv run Rscript -e 'library(reticulate);use_virtualenv(".venv/"); py_config()$version ;os <- import("os"); os$listdir()'
# 
echo ===============the other python=============
UV_VENV_CLEAR=1 uv venv --python  python@3.14t
gdb --batch --ex run --ex bt --ex quit --args  uv run Rscript -e 'library(reticulate)  ;use_virtualenv(".venv/") ; cat(py_config()$version);os <- import("os"); os$listdir()'

the log

================ Non threaded python =================
Using CPython 3.14.0
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate
[1] ‘3.14’
 [1] ".git-blame-ignore-revs"        ".github"                      
 [3] "cran-comments.md"              "reticulate.Rproj"             
 [5] "man"                           "src"                          
 [7] "NAMESPACE"                     "log.out"                      
 [9] "tests"                         "NEWS.md"                      
[11] "tools"                         "DESCRIPTION"                  
[13] ".Rbuildignore"                 ".git"                         
[15] ".gitignore"                    ".venv"                        
[17] "deactivate"                    "inst"                         
[19] "activate"                      "_pkgdown.yml"                 
[21] "a.out"                         "LICENSE"                      
[23] "README.md"                     "reticulate_1.44.0.9000.tar.gz"
[25] "vignettes"                     "R"                            
===============the other python=============
Using CPython 3.14.0
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff717f6c0 (LWP 747818)]
[Detaching after fork from child process 747819]

 *** caught segfault ***
address 0xffffffffffffffe0, cause 'memory not mapped'

Traceback:
 1: py_initialize(config$python, config$libpython, config$pythonhome,     config$virtualenv_activate, config$version$major, config$version$minor,     interactive(), numpy_load_error)
 2: (function() {    Sys.setenv(PYTHONPATH = newpythonpath)    on.exit(Sys.setenv(PYTHONPATH = oldpythonpath), add = TRUE)    py_initialize(config$python, config$libpython, config$pythonhome,         config$virtualenv_activate, config$version$major, config$version$minor,         interactive(), numpy_load_error)})()
 3: doTryCatch(return(expr), name, parentenv, handler)
 4: tryCatchOne(expr, names, parentenv, handlers[[1L]])
 5: tryCatchList(expr, classes, parentenv, handlers)
 6: tryCatch({    oldpythonpath <- Sys.getenv("PYTHONPATH")    newpythonpath <- Sys.getenv("RETICULATE_PYTHONPATH", unset = paste(config$pythonpath,         system.file("python", package = "reticulate"), sep = .Platform$path.sep))    local({        Sys.setenv(PYTHONPATH = newpythonpath)        on.exit(Sys.setenv(PYTHONPATH = oldpythonpath), add = TRUE)        py_initialize(config$python, config$libpython, config$pythonhome,             config$virtualenv_activate, config$version$major,             config$version$minor, interactive(), numpy_load_error)    })}, error = function(e) {    Sys.setenv(PATH = oldpath)    if (is.na(curr_session_env)) {        Sys.unsetenv("R_SESSION_INITIALIZED")    }    else {        Sys.setenv(R_SESSION_INITIALIZED = curr_session_env)    }    stop(e)})
 7: initialize_python()
 8: ensure_python_initialized()
 9: py_config()
10: cat(py_config()$version)
An irrecoverable exception occurred. R is aborting now ...
[Thread 0x7ffff717f6c0 (LWP 747818) exited]
[Inferior 1 (process 747815) exited with code 0213]
No stack.