Improve GoToRelevantFile performance

[jenny-codes]

Description

Ruby LSP Information

Parent issue #2966

The GoToRelevantFile function added in #2985 works well with small size repos, but it has a noticeable lag when used on a larger codebase.

Benchmark measurements on the shopify core codebase on my machine

(In order: user CPU time, system CPU time, the sum of the user and system CPU times, elapsed real time)

  0.875498   0.938839   1.814337 (  2.438297)
  0.204476   0.908439   1.112915 (  1.319023)
  1.396747   1.401042   2.797789 (  3.252911)
  3.044789   4.278284   7.323073 (  6.205184)
  2.496724   4.009404   6.506128 (  5.499605)
  2.575118   4.419145   6.994263 (  5.775319)
  2.427883   3.813284   6.241167 (  5.337139)
  2.646134   3.806451   6.452585 (  5.554977)
  1.610006   3.839775   5.449781 (  4.531290)
  3.278136   4.539844   7.817980 (  6.581827)

Different random file are used each time. This is the measurement of the time it takes to run the GoToRelevantFile#perform only.

[domingo2000]

I provided an idea on how this could be optimized without chaning the strategy for finding relevant files that much. The idea is in this PR. ¿Do you have any feedback or other ideas?