* skip validation, always include cmake
* rm unconditional inclusion of zlib
* always include zlib
* correct path for builtin_extensions
* find builtin extensions recursively
* include test_utils always
* add logs for build_samples
* skip tests with dir accessing
* remove platform specification for samples build
* do not pkgconfig on win, use cmake generic on linux for samples
* rm make
* fix num_threads
* use bare numbers
* skip failing
* skip test_lrn_basic
* find zlib
* print error of downloading
* add linux pipeline
* do not save cache from PRs; add skipif only in GHA
* rm caching
* evaluate against a string
* do not include test_utils to the install dir
Andrey Kashchikhin