node/object: Improve SEARCH and GET

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 70.00000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 28.79%. Comparing base (e500166) to head (7b06cee). Report is 5 commits behind head on master.

:exclamation: Current head 7b06cee differs from pull request most recent head 2521e89. Consider uploading reports for the commit 2521e89 to get more accurate results

Files	Patch %	Lines
pkg/services/object/search/container.go	57.14%	1 Missing and 2 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2722 +/- ## ========================================== + Coverage 22.20% 28.79% +6.58% ========================================== Files 793 415 -378 Lines 47442 32385 -15057 ========================================== - Hits 10533 9324 -1209 + Misses 36004 22225 -13779 + Partials 905 836 -69 ```

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[cthulhu-rider]

prelim refactor has been done to:

• decrease number of utility components: they did not justify themselves, over time the code remained more complex, and the proposed flexibility was not needed
• make subsequent optimizations under the hood without affecting the code architecture

[cthulhu-rider]

decided to leave standalone improvements here and continue policy optimizations in next PR