Mitigate Linux CVE 2023-2002 by avoiding calling isatty on stdin

[squell]

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[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: +0.02 :tada:

Comparison is base (fe8bf15) 77.32% compared to head (849d9c1) 77.34%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #254      +/-   ##
==========================================
+ Coverage   77.32%   77.34%   +0.02%     
==========================================
  Files          38       38              
  Lines        4740     4737       -3     
==========================================
- Hits         3665     3664       -1     
+ Misses       1075     1073       -2     

Impacted Files	Coverage Δ
lib/sudo-pam/src/rpassword.rs	35.22% <0.00%> (+1.16%)	:arrow_up:

... and 1 file with indirect coverage changes

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