refactor: simplify hooks implementation

[julienrbrt]

Description

Closes: #12079

• deletes keeper/hooks.go when possible
• does not touch types/hooks.go, agrees with Refactor to delete every modules keeper/hooks.go file #12079 (comment), I think reflection makes it less understandable than the current implementation.

---

Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[codecov]

Codecov Report

Merging #13396 (ab4b89a) into main (4fe7797) will decrease coverage by 1.52%.
The diff coverage is 26.66%.

❗ Current head ab4b89a differs from pull request most recent head 4f4755c. Consider uploading reports for the commit 4f4755c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13396      +/-   ##
==========================================
- Coverage   55.87%   54.35%   -1.53%     
==========================================
  Files         646      640       -6     
  Lines       54895    54820      -75     
==========================================
- Hits        30675    29798     -877     
- Misses      21762    22620     +858     
+ Partials     2458     2402      -56     

Impacted Files	Coverage Δ
baseapp/grpcrouter.go	90.00% <ø> (ø)
baseapp/grpcrouter_helpers.go	25.00% <ø> (ø)
baseapp/grpcserver.go	1.72% <ø> (ø)
baseapp/msg_service_router.go	85.29% <ø> (+4.41%)	⬆️
baseapp/options.go	67.92% <0.00%> (-0.60%)	⬇️
client/broadcast.go	54.54% <ø> (+2.99%)	⬆️
client/cmd.go	57.73% <ø> (ø)
client/config/toml.go	55.55% <ø> (ø)
client/context.go	54.49% <ø> (-1.79%)	⬇️
client/flags/flags.go	19.35% <ø> (-0.32%)	⬇️
... and 253 more