LSPS5 follow up: Move TimeProvider to utils::time module for better organization

[martinsaposnic]

This is a follow up for the LSPS5 merged PR. Comment by @tnull#3662 (comment)

Might be worth moving this to some crate::utils::time or similar path, if we'll end up keeping it at all. (in a follow-up)

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.92%. Comparing base (ff279d6) to head (81313cd).
⚠️ Report is 33 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@## main #3962 +/- ##
========================================
Coverage 88.91% 88.92% ========================================
Files 173 174 +1 Lines 123393 123794 +401 Branches 123393 123794 +401 ========================================
+ Hits 109717 110083 +366 - Misses 11216 11252 +36 + Partials 2460 2459 -1 

Flag	Coverage Δ
fuzzing	22.21% <0.00%> (-0.11%)	⬇️
tests	88.75% <100.00%> (+<0.01%)	⬆️

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[tnull]

post-merge ACK