Do not panic when there is auto impl type check

[xunilrj]

Description

This PR tries to fix #6093.

The cause seems to be a problem with our error reporting. What is happening is, the source code has other errors unrelated to auto impl of AbiEncode. For example, some private fields are being accessed from other modules.

This is currently panicking because when type-checking the auto impl, some of these errors "leak" into the auto impl type_check and make it fail completely; I was expecting the type check would always finish, even if with some errors.

This was being used as a security guard against implementation bugs. But now that the auto impl is more stable we can remove it, and when a type check completely fails, we do not panic anymore, just failing that particular auto impl.

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
  • If my change requires substantial documentation changes, I have requested support from the DevRel team
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[github-actions]

Benchmark for 75bb832

Click to view benchmark

Test	Base	PR	%
code_action	5.4±0.03ms	5.4±0.03ms	0.00%
code_lens	355.9±11.54ns	334.6±8.83ns	-5.98%
compile	4.0±0.13s	4.0±0.07s	0.00%
completion	4.8±0.09ms	4.7±0.02ms	-2.08%
did_change_with_caching	3.7±0.06s	3.7±0.07s	0.00%
document_symbol	959.4±19.74µs	973.7±35.22µs	+1.49%
format	74.5±0.67ms	73.8±1.44ms	-0.94%
goto_definition	368.8±8.91µs	369.6±7.71µs	+0.22%
highlight	9.1±0.02ms	9.0±0.02ms	-1.10%
hover	541.3±9.09µs	540.0±7.89µs	-0.24%
idents_at_position	123.5±0.28µs	125.3±0.73µs	+1.46%
inlay_hints	670.7±9.86µs	663.7±16.92µs	-1.04%
on_enter	452.3±15.38ns	457.8±15.08ns	+1.22%
parent_decl_at_position	3.7±0.03ms	3.7±0.05ms	0.00%
prepare_rename	363.6±10.47µs	364.4±6.04µs	+0.22%
rename	9.7±0.22ms	9.7±0.14ms	0.00%
semantic_tokens	979.4±21.04µs	994.6±24.39µs	+1.55%
token_at_position	357.3±3.03µs	360.1±2.13µs	+0.78%
tokens_at_position	3.7±0.01ms	3.7±0.03ms	0.00%
tokens_for_file	426.4±1.88µs	440.6±1.74µs	+3.33%
traverse	39.1±1.70ms	40.4±1.47ms	+3.32%