Enhance ledger-tool for multi-epoch rewards (bp #13837)

[mergify]

This is an automated backport of pull request #13837 done by Mergify

Cherry-pick of 6048342 has failed:

On branch mergify/bp/v1.3/pr-13837
Your branch is up to date with 'origin/v1.3'.

You are currently cherry-picking commit 6048342c5.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:

	modified:   programs/stake/src/stake_state.rs
	modified:   runtime/src/bank.rs

Unmerged paths:
  (use "git add <file>..." to mark resolution)

	both modified:   ledger-tool/src/main.rs

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[ryoqun]

hmm, I might fix this conflicts later...

[codecov]

Codecov Report

Merging #13838 (6048342) into v1.3 (51e8872) will decrease coverage by 0.4%.
The diff coverage is 67.4%.

@@           Coverage Diff            @@
##            v1.3   #13838     +/-   ##
========================================
- Coverage   82.5%    82.0%   -0.5%     
========================================
  Files        368      381     +13     
  Lines      88151    93220   +5069     
========================================
+ Hits       72744    76530   +3786     
- Misses     15407    16690   +1283     

[ryoqun]

Codecov Report

Merging #13838 (6048342) into v1.3 (51e8872) will decrease coverage by 0.4%.
The diff coverage is 67.4%.

@@           Coverage Diff            @@
##            v1.3   #13838     +/-   ##
========================================
- Coverage   82.5%    82.0%   -0.5%     
========================================
  Files        368      381     +13     
  Lines      88151    93220   +5069     
========================================
+ Hits       72744    76530   +3786     
- Misses     15407    16690   +1283     

how could codecov manage to report this even if the coverage build didn't run at all???

[ryoqun]

I abandon back-porting this.