replace go-clock with synctest

[gammazero]

• Replace go-clock in bitswap/client/internal/messagequeue
• Replace go-clock in bitswap/server
• Replace go-clock in routing/http/client

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.06%. Comparing base (de0b141) to head (ad144a7).

@@            Coverage Diff             @@
##             main    #1082      +/-   ##
==========================================
- Coverage   61.08%   61.06%   -0.03%     
==========================================
  Files         264      264              
  Lines       26225    26216       -9     
==========================================
- Hits        16020    16008      -12     
- Misses       8525     8526       +1     
- Partials     1680     1682       +2     

Files with missing lines	Coverage Δ
...client/internal/messagequeue/donthavetimeoutmgr.go	93.24% <100.00%> (-0.10%)	⬇️
...tswap/client/internal/messagequeue/messagequeue.go	82.38% <100.00%> (+1.47%)	⬆️
bitswap/server/internal/decision/scoreledger.go	94.07% <100.00%> (-0.13%)	⬇️
routing/http/client/client.go	75.47% <100.00%> (-0.07%)	⬇️

... and 8 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.