M 176 sqlite inconsistencies

[niden]

Hello!

• Type: bug fix
• Link to issue: SQLite: migrations fail with 'no such table: information_schema.tables' #176

In raising this pull request, I confirm the following (please check boxes):

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR

Fixed information_schema reference in Sqlite, CURRENT_TIMESTAMP and other fixes - synched with other adapters

Thanks

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.59%. Comparing base (9708dbd) to head (ade0869).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #177      +/-   ##
==========================================
+ Coverage   75.57%   77.59%   +2.02%     
==========================================
  Files          34       34              
  Lines        2641     2665      +24     
==========================================
+ Hits         1996     2068      +72     
+ Misses        645      597      -48     

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