Inlined data

[raakella1]

• Do not allocate blks if data is not inlined
• Implement a basic version of is_resync_mode where we declare the follower to be in resync mode if the diff between leader_commit_lsn and his own last_log_idx from logstore is greater than a threshold

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 68.42105% with 6 lines in your changes missing coverage. Please review.

Project coverage is 67.43%. Comparing base (1a0cef8) to head (3a73bc0). Report is 48 commits behind head on master.

Files	Patch %	Lines
src/lib/replication/repl_dev/raft_repl_dev.cpp	68.42%	5 Missing and 1 partial :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #521 +/- ## =========================================== + Coverage 56.51% 67.43% +10.91% =========================================== Files 108 109 +1 Lines 10300 10421 +121 Branches 1402 1400 -2 =========================================== + Hits 5821 7027 +1206 + Misses 3894 2713 -1181 - Partials 585 681 +96 ```

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