Hide __CPROVER_deallocated updates behind a function

[tautschnig]

This avoids repeating similar code in several places.

• Each commit message has a non-empty body, explaining why the change was made.
• Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
• n/a My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• n/a White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

Merging #6859 (5d74a03) into develop (a9ddceb) will increase coverage by 0.00%.
The diff coverage is 60.31%.

@@           Coverage Diff            @@
##           develop    #6859   +/-   ##
========================================
  Coverage    77.78%   77.78%           
========================================
  Files         1567     1567           
  Lines       179701   179701           
========================================
+ Hits        139788   139789    +1     
+ Misses       39913    39912    -1     

Impacted Files	Coverage Δ
src/analyses/cfg_dominators.h	100.00% <ø> (ø)
src/analyses/invariant_set_domain.cpp	0.00% <0.00%> (ø)
src/ansi-c/ansi_c_internal_additions.cpp	90.12% <ø> (ø)
src/goto-instrument/dot.cpp	0.00% <0.00%> (ø)
src/goto-programs/remove_returns.cpp	98.15% <ø> (ø)
src/goto-programs/show_goto_functions_xml.cpp	0.00% <0.00%> (ø)
src/goto-symex/symex_goto.cpp	97.12% <ø> (ø)
src/goto-symex/symex_main.cpp	86.97% <0.00%> (ø)
src/goto-symex/solver_hardness.cpp	53.00% <11.11%> (ø)
src/goto-instrument/wmm/goto2graph.cpp	54.49% <12.50%> (ø)
... and 29 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 970cc26...5d74a03. Read the comment docs.