Fix timeout validation for timeout height

[yito88]

Closes: #555
Closes: #443

Description

Only when both the timeout height and timestamp have not passed yet, the timeout handler returns an error PacketTimeoutNotReached.

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PR author checklist:

• Added changelog entry, using unclog.
• Added tests.
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[codecov]

Codecov Report

Patch coverage: 98.38% and project coverage change: +0.19 🎉

Comparison is base (7be8927) 72.70% compared to head (1807704) 72.90%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #556      +/-   ##
==========================================
+ Coverage   72.70%   72.90%   +0.19%     
==========================================
  Files         126      126              
  Lines       15550    15594      +44     
==========================================
+ Hits        11306    11369      +63     
+ Misses       4244     4225      -19     

Impacted Files	Coverage Δ
crates/ibc/src/core/ics04_channel/error.rs	0.00% <ø> (ø)
...ates/ibc/src/core/ics04_channel/handler/timeout.rs	93.71% <98.38%> (+4.45%)	⬆️

... and 1 file with indirect coverage changes

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[plafer]

@yito88 any idea why the CI suddenly fails?

this is happening in other PRs too, will investigate

[plafer]

Thank you!