* [OPIK-440]: add cost to traces, spans;

* [OPIK-440]: add a new filter type;

* [OPIK-440]: remove cost from a default list and floor the values for tables;

* [OPIK-440]: improve code readability;

* [OPIK-440]: add estimated cost to span details;

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Co-authored-by: Sasha <aliaksandr@comet.com>