Combine multiple hardforks into one

[VAIBHAVJINDAL3012]

Description

This PR merges all the following hf
1.GetValidatorSetRotationStopHeight
2.GetMilestoneHardForkHeight()
3.GetNoAckProposerCheckHeight()
into the one single aalborg hf

[codecov]

Codecov Report

Patch coverage: 75.00% and project coverage change: -0.02% ⚠️

Comparison is base (8a26699) 76.46% compared to head (917cc03) 76.45%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1039      +/-   ##
===========================================
- Coverage    76.46%   76.45%   -0.02%     
===========================================
  Files           53       53              
  Lines         5915     5911       -4     
===========================================
- Hits          4523     4519       -4     
  Misses        1133     1133              
  Partials       259      259              

Files Changed	Coverage Δ
app/app.go	82.68% <0.00%> (ø)
checkpoint/side_milestone_handler.go	93.93% <ø> (-0.18%)	⬇️
auth/ante.go	81.72% <100.00%> (ø)
checkpoint/handler.go	80.15% <100.00%> (ø)
staking/keeper.go	67.88% <100.00%> (ø)

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