support manual trigger snapshot creation function

[Besroy]

Add manual snapshot creation API for log truncation control with 3 capabilities:

1. Update truncation upper limit: Allows truncating logs up to a specified threshold when the in-memory truncation_upper_limit is zero (e.g., after restart).
2. Trigger snapshot via NuRaft API: Leverages NuRaft's snapshot creation AP: Triggers snapshot creation immediately based on current commit idx. NuRaft handles race conditions internally so we don't need to do more (e.g., rejecting concurrent snapshot requests and using distance checks and flags to prevent concurrency issues)
3. support truncate logs upto compact_lsn: if the compaction in raft didn't truncate logs as much as expected, it will trigger compact again to truncate logs. Please set wait_for_commit=true to make sure truncated logs have been committed.

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 20.68966% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.44%. Comparing base (1a0cef8) to head (ee8a6c1).
⚠️ Report is 302 commits behind head on master.

Files with missing lines	Patch %	Lines
src/lib/replication/repl_dev/raft_repl_dev.cpp	28.57%	13 Missing and 2 partials ⚠️
src/lib/replication/service/raft_repl_service.cpp	0.00%	6 Missing ⚠️
src/lib/replication/repl_dev/solo_repl_dev.h	0.00%	1 Missing ⚠️
src/lib/replication/service/generic_repl_svc.cpp	0.00%	1 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #840      +/-   ##
==========================================
- Coverage   56.51%   49.44%   -7.08%     
==========================================
  Files         108      110       +2     
  Lines       10300    11460    +1160     
  Branches     1402     5432    +4030     
==========================================
- Hits         5821     5666     -155     
+ Misses       3894     2096    -1798     
- Partials      585     3698    +3113     

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[Besroy]

No need, found the root cause is we didn't save receiving_snapshot_ in srv_state

[Besroy]

If we just want to compact logs to make sure new member catch up by BR, and compact during create_snasphot has been triggered, we don't need compact again here. If we want to truncate logs upto compact_lsn, we need it here.