fix: Remove RpcEntryNotFound from ClioError

[emreariyurek]

Since rippled has its own error codes, all occurrences have been replaced except for PR2549, and the entry has also been removed entirely from Clio’s error enum. This modification follows the feedback provided in this comment: #2549 (comment)

Pending compatible libxrpl — temporarily on hold

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.91%. Comparing base (3aa1854) to head (29b0f5a).
⚠️ Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/rpc/handlers/VaultInfo.cpp	75.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2661   +/-   ##
========================================
  Coverage    81.91%   81.91%           
========================================
  Files          381      381           
  Lines        14424    14424           
  Branches      7936     7936           
========================================
  Hits         11816    11816           
  Misses        1443     1443           
  Partials      1165     1165           

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[kuznetsss]

Looks good, thanks!
But why don't we have to change any tests? I think it would be good to add some tests (in this PR or create an issue and do it in a separate PR).

[godexsoft]

LGTM