raft: open db on service.Open instead on apply

[moogacs]

What's being changed:

this PR avoid reopening the db with every apply and instead does it at the beginning when we start newRaft

this pr is part of series of PRs
#4876
#4878

Why: we ended up in situation we made assumption that the database has to be updated before schema and that caused some confusion.

How:
Old approach:
open database at the beginning only if the node was fresh
open the db again on apply command
separate between commands to be applied on db or schema only based on newAppliedIndex <= initialLastAppliedIndex

New approach:
always open database at the beginning of raft init if there is something to catch up on
always updating both database and schema at the same time by applying schema 1st then the database, so that schema has the validation logic to protect any updates from going to the database

chaos pipeline

Review checklist

• Documentation has been updated, if necessary. Link to changed documentation:
• Chaos pipeline run or not necessary. Link to pipeline:
• All new code is covered by tests where it is reasonable.
• Performance tests have been run or not necessary.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud