[#3647] Prevent invalid time from crashing form

[SilviaAmAm]

Fixes open-formulieren/open-forms#3647

The behaviour is still not right: the validation only triggers on the 'on blur' event (so the check logic call happens with invalid data). But the backend doesn't crash anymore (with this fix https://github.com/open-formulieren/open-forms/pull/3670) so the form doesn't crash.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (b405923) 72.36% compared to head (b4d8cf5) 72.41%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #609 +/- ## ========================================== + Coverage 72.36% 72.41% +0.05% ========================================== Files 214 214 Lines 4335 4343 +8 Branches 1160 1162 +2 ========================================== + Hits 3137 3145 +8 Misses 1159 1159 Partials 39 39 ```

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[sergei-maertens]

Backports:

• stable/2.0.x: ab4045aa9e25de63232a65ab1e42a7ef791c3e30
• stable/1.5.x: ff7e1d8c53c23772f8198f0673d7f0ff1011cb52
• stable/1.4.x: 65b8edb9eda3c60d955f59fb073caf6e30c6344d
• stable/1.3.x: a25c6c4a26f79c25d3993d35f7db0227984eb206