core: change scoreV2 to adapt the higher disk capacity and amp . (#4837)

[ti-chi-bot]

This is an automated cherry-pick of #4837

Signed-off-by: bufferflies [email protected]

What problem does this PR solve?

Issue Number: Close #4805

What is changed and how it works?

if the biggest store's capacity is more than 2T , the store's score may be closed to the up score as b(1e7). so the smallest store will not be balanced even if they has less available capacity.

Check List

Tests

• Unit test

Code changes

Side effects

Related changes

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• disksing
• rleungx

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[codecov]

Codecov Report

Merging #4847 (a615d30) into release-5.3 (bea87ac) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           release-5.3    #4847      +/-   ##
===============================================
- Coverage        74.93%   74.90%   -0.04%     
===============================================
  Files              263      263              
  Lines            27341    27341              
===============================================
- Hits             20489    20480       -9     
- Misses            5040     5044       +4     
- Partials          1812     1817       +5     

Flag	Coverage Δ
unittests	74.90% <100.00%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
server/core/test_util.go	83.20% <ø> (ø)
server/core/store.go	81.57% <100.00%> (ø)
server/schedulers/shuffle_hot_region.go	55.55% <0.00%> (-10.11%)	⬇️
server/tso/local_allocator.go	71.62% <0.00%> (-6.76%)	⬇️
server/id/id.go	76.19% <0.00%> (-4.77%)	⬇️
server/server.go	70.96% <0.00%> (-1.93%)	⬇️
pkg/btree/btree.go	85.78% <0.00%> (-0.97%)	⬇️
server/encryptionkm/key_manager.go	72.80% <0.00%> (-0.80%)	⬇️
server/core/storage.go	68.79% <0.00%> (-0.76%)	⬇️
server/cluster/cluster.go	82.46% <0.00%> (-0.47%)	⬇️
... and 8 more

---

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[nolouch]

/merge

[ti-chi-bot]

@nolouch: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: b56b74c