Try to kill debuggee if Linux recording times out

[ranweiler]

Closes #3174.

[codecov-commenter]

Codecov Report

Merging #3177 (2229dd6) into main (8c90419) will decrease coverage by 4.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3177      +/-   ##
==========================================
- Coverage   29.59%   25.57%   -4.03%     
==========================================
  Files         332      152     -180     
  Lines       38910    16327   -22583     
==========================================
- Hits        11516     4175    -7341     
+ Misses      27394    12152   -15242     

see 180 files with indirect coverage changes

[ranweiler]

Manual testing:

• Modified coverage example to loop instead of exiting on recording errors (to allow observing dangling tracee child processes)
• Ran coverage against a target tracee modified to hang on any input
• Red/green testing: before changes, observed a dangling tracee subprocess on timeout. After changes, tracee was terminated across a wide range of timeout values.

[ranweiler]

Integration tests passed, confirmed that reports look as expected.