fast_add_function removed in 8.3

[remicollet]

From UPGRADING.INTERNALS

* The fast_add_function() has been removed, use add_function() that will
  call the static inline add_function_fast() instead.

This simple change allow to build Phalcon 5.4 against 8.3.0RC5 (but not tested)

[remicollet]

Already in PR #2408

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
4 Security Hotspots
12 Code Smells

No Coverage information
5.0% Duplication

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[codecov]

Codecov Report

Merging #2418 (29b44b4) into development (6773f19) will not change coverage.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             development   #2418   +/-   ##
=============================================
  Coverage           7.00%   7.00%           
  Complexity          8632    8632           
=============================================
  Files                343     343           
  Lines              23228   23228           
=============================================
  Hits                1628    1628           
  Misses             21600   21600