fix(ics20): Extract grant checking and updating functions for reuse (backport #1850)

[mergify]

This is an automatic backport of pull request #1850 done by Mergify.
Cherry-pick of 6d2d0f1 has failed:

On branch mergify/bp/release/v15.0.x/pr-1850
Your branch is up to date with 'origin/release/v15.0.x'.

You are currently cherry-picking commit 6d2d0f1f.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   precompiles/authorization/events.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   CHANGELOG.md
	both modified:   precompiles/ics20/events.go
	both modified:   precompiles/ics20/tx.go
	both modified:   precompiles/ics20/types.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[codecov]

Codecov Report

Merging #1872 (5062f9a) into release/v15.0.x (08d355a) will increase coverage by 0.20%.
The diff coverage is 93.93%.

@@                 Coverage Diff                 @@
##           release/v15.0.x    #1872      +/-   ##
===================================================
+ Coverage            70.42%   70.63%   +0.20%     
===================================================
  Files                  315      315              
  Lines                23428    23375      -53     
===================================================
+ Hits                 16500    16510      +10     
+ Misses                6112     6049      -63     
  Partials               816      816              

Files	Coverage Δ
precompiles/authorization/events.go	0.00% <ø> (ø)
precompiles/ics20/events.go	70.96% <ø> (+34.30%)	⬆️
precompiles/ics20/types.go	71.05% <100.00%> (+3.56%)	⬆️
precompiles/ics20/tx.go	75.00% <75.00%> (-7.36%)	⬇️