ci: fix intermittent disk I/O error

[aloisklink]

GitHub Actions CI tests are failing intermittently due to an SQLite Failed to execute statement: disk I/O error.

I'm pretty sure this is due to some sort of race condition, either with:

• a) our thread code
• b) GitHub Actions file-system

This commit adds a sleep 5 between the CI tests and the coverage tests in an attempt to prevent this error.

Fixes #252 (hopefully at least!)

[codecov]

Codecov Report

Merging #254 (c011394) into main (1c9a82a) will increase coverage by 0.36%.
The diff coverage is n/a.

❗ Current head c011394 differs from pull request most recent head 7b1d01b. Consider uploading reports for the commit 7b1d01b to get more accurate results

@@            Coverage Diff             @@
##             main     #254      +/-   ##
==========================================
+ Coverage   48.51%   48.88%   +0.36%     
==========================================
  Files         113      113              
  Lines       17887    18423     +536     
==========================================
+ Hits         8678     9006     +328     
- Misses       9209     9417     +208     

Impacted Files	Coverage Δ
src/utils/nl.c	10.17% <0.00%> (-0.55%)	⬇️
tests/supervisor/test_cmd_processor.c	100.00% <0.00%> (ø)
...apture/middlewares/header_middleware/dns_decoder.c	0.00% <0.00%> (ø)
...pture/middlewares/header_middleware/mdns_decoder.c	0.00% <0.00%> (ø)
...ure/middlewares/header_middleware/packet_decoder.c	0.00% <0.00%> (ø)
src/utils/iface.c	22.22% <0.00%> (+1.68%)	⬆️
src/utils/net.c	81.87% <0.00%> (+3.80%)	⬆️

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[mereacre]

Yes, it might be the capture threads as all of them are trying to write to the same db.

[aloisklink]

I tried testing locally with the following, and I couldn't reproduce it locally. Maybe it might be because GitHub Actions is pretty slow.

for i in {1..50}; do
  echo "$i";
  ctest --preset linux-with-example-middlewares --output-on-failure;
done