refactor(libscap): use scap_errprintf for scap errors handling

[ekoops]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind bug

/kind cleanup

/kind design

/kind documentation

/kind failing-test

/kind feature

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area API-version

/area build

/area CI

/area driver-kmod

/area driver-bpf

/area driver-modern-bpf

/area libscap-engine-bpf

/area libscap-engine-gvisor

/area libscap-engine-kmod

/area libscap-engine-modern-bpf

/area libscap-engine-nodriver

/area libscap-engine-noop

/area libscap-engine-source-plugin

/area libscap-engine-savefile

/area libscap

/area libpman

/area libsinsp

/area tests

/area proposals

Does this PR require a change in the driver versions?

/version driver-API-version-major

/version driver-API-version-minor

/version driver-API-version-patch

/version driver-SCHEMA-version-major

/version driver-SCHEMA-version-minor

/version driver-SCHEMA-version-patch

What this PR does / why we need it:

This PR replaces all custom scap errors handing with the usage of scap_errprintf macro.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[poiana]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[github-actions]

Please double check driver/API_VERSION file. See versioning.

/hold

[FedeDP]

/milestone 0.21.0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.03%. Comparing base (c1e6254) to head (7a87905).
Report is 5 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2286   +/-   ##
=======================================
  Coverage   77.03%   77.03%           
=======================================
  Files         221      221           
  Lines       30127    30127           
  Branches     4613     4613           
=======================================
  Hits        23207    23207           
  Misses       6920     6920           

Flag	Coverage Δ
libsinsp	77.03% <ø> (ø)

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[github-actions]

Perf diff from master - unit tests

     6.29%     -0.59%  [.] sinsp::next
     2.04%     +0.53%  [.] sinsp_thread_manager::find_thread
     1.01%     -0.40%  [.] sinsp_parser::event_cleanup
     6.48%     -0.33%  [.] sinsp_parser::reset
     0.92%     +0.32%  [.] sinsp::fetch_next_event
     0.25%     +0.31%  [.] std::_Hashtable<unsigned long, std::pair<unsigned long const, std::shared_ptr<ppm_evt_hdr> >, std::allocator<std::pair<unsigned long const, std::shared_ptr<ppm_evt_hdr> > >, std::__detail::_Select1st, std::equal_to<unsigned long>, std::hash<unsigned long>, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<false, false, true> >::find
     9.16%     +0.28%  [.] sinsp_thread_manager::create_thread_dependencies
     1.98%     +0.27%  [.] sinsp_parser::process_event
     0.85%     -0.24%  [.] sinsp_evt::get_direction
     2.50%     -0.23%  [.] sinsp_evt::load_params

Heap diff from master - unit tests

peak heap memory consumption: 0B
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

Heap diff from master - scap file

peak heap memory consumption: 0B
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

Benchmarks diff from master

Comparing gbench_data.json to /root/actions-runner/_work/libs/libs/build/gbench_data.json
Benchmark                                                         Time             CPU      Time Old      Time New       CPU Old       CPU New
----------------------------------------------------------------------------------------------------------------------------------------------
BM_sinsp_split_mean                                            +0.0637         +0.0636           141           150           141           150
BM_sinsp_split_median                                          +0.0626         +0.0625           141           150           141           150
BM_sinsp_split_stddev                                          -0.7641         -0.7647             1             0             1             0
BM_sinsp_split_cv                                              -0.7782         -0.7788             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_mean                  +0.0741         +0.0740            54            58            54            58
BM_sinsp_concatenate_paths_relative_path_median                +0.0785         +0.0784            53            58            53            58
BM_sinsp_concatenate_paths_relative_path_stddev                -0.0460         -0.0454             1             1             1             1
BM_sinsp_concatenate_paths_relative_path_cv                    -0.1118         -0.1111             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_mean                     +0.0473         +0.0472            23            25            23            25
BM_sinsp_concatenate_paths_empty_path_median                   +0.0456         +0.0454            23            25            23            25
BM_sinsp_concatenate_paths_empty_path_stddev                   +0.1574         +0.1559             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_cv                       +0.1051         +0.1038             0             0             0             0
BM_sinsp_concatenate_paths_absolute_path_mean                  +0.1266         +0.1265            52            59            52            59
BM_sinsp_concatenate_paths_absolute_path_median                +0.1263         +0.1262            52            59            52            59
BM_sinsp_concatenate_paths_absolute_path_stddev                +0.0009         +0.0025             0             0             0             0
BM_sinsp_concatenate_paths_absolute_path_cv                    -0.1116         -0.1100             0             0             0             0