Fix #14607: MISRA: make rule 10.3 warn on bool <- 0/1 in C99 and later

[varshneydevansh]

Fix #14607.

This updates MISRA rule 10.3 in addons/misra.py so that assignments of integer literals 0 and 1 to bool are only exempted in C89.

Behavior after this change:

• C89: keep the existing behavior and allow bool <- 0/1
• C99/C11/C17/C18/C23: report MISRA 10.3 for bool <- 0/1

The motivation is that in C99 and later, bool/true/false are available, so the current unconditional exemption for 0 and 1 causes a MISRA 10.3 false negative.

Changes:

• update addons/misra.py rule 10.3 to make the bool <- 0/1 exemption standard-dependent
• add C89-side coverage in addons/test/misra/misra-test.c
• add C11-side coverage in addons/test/misra/misra-test-c11.c
• add a release notes entry

Related Context:

• Earlier discussion: feat: enforcing MISRA compliant Boolean values #7110
• Downstream issue: cppcheck: catch ints as bools commaai/panda#2105

[varshneydevansh]

Trac ticket is now filed: https://trac.cppcheck.net/ticket/14607

Local verification passed:

• misra.py -verify for misra-test.c with --std=c89
• misra.py -verify for misra-test-c11.c with --std=c11
• PYTHONPATH=./addons .venv/bin/python -m pytest addons/test/misra_test.py

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[danmar]

@varshneydevansh thanks for your contribution. what name would you like that I add in the AUTHORS file?

[varshneydevansh]

Let's add the name Devansh Varshney :)

Thanks Daniel.