Fix type errors in cprofiles

[jeredfloyd]

Fix type errors that prevent build on Fedora 40+.

Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.

[arasic]

Can you inspect futher, after applying your changes, I got this error:

[ 21%] Built target cmetrics-static
[ 22%] Built target ctraces-static
[ 22%] Building C object lib/cprofiles/src/CMakeFiles/cprofiles-static.dir/cprof_profile.c.o
/home/arasic/github/fluent-bit/lib/cprofiles/src/cprof_profile.c: In function ‘cprof_profile_destroy’:
/home/arasic/github/fluent-bit/lib/cprofiles/src/cprof_profile.c:175:9: error: ‘function’ undeclared (first use in this function)
  175 |         function = cfl_list_entry(iterator,
      |         ^~~~~~~~

thanks!