2/n Move Precision Plugin into strategy - move optimizer related logics

[four4fish]

What does this PR do?

1/n Move Precision Plugin into Strategy and update references
2/n Move optimizer, lr to Strategy
3/n Simplify and reduce hooks and redundancies

Fixes #7324 which is part of #10416

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[awaelchli]

apart from existing open comments, LGTM, nice work!

[tchaton]

LGTM !

[codecov]

Codecov Report

Merging #10596 (cafbbd4) into master (8bf7f9c) will decrease coverage by 2%.
The diff coverage is 76%.

@@           Coverage Diff            @@
##           master   #10596    +/-   ##
========================================
- Coverage      90%      88%    -2%     
========================================
  Files         177      177            
  Lines       16505    16509     +4     
========================================
- Hits        14920    14535   -385     
- Misses       1585     1974   +389