Accumulate typechecking methods in impl TypeCheckContext, part 1

[anton-trunov]

Description

Partially resolves issue #5050

All methods from impl Namespace from the file namespace.rs that also take Engines as a parameter have been moved into impl TypeCheckContext.

I'm splitting the refactoring into several PRs to solicit early feedback, make review process a bit easier and potentially create fewer merge conflicts.

List of changes:

• ctx.namespace.find_method_for_type -> ctx.find_method_for_type
• ctx.namespace.find_constant_for_type -> ctx.find_constant_for_type
• ctx.namespace.get_items_for_type_and_trait_name -> ctx.get_items_for_type_and_trait_name
• ctx.namespace.insert_trait_implementation -> ctx.insert_trait_implementation
• ctx.namespace.variant_import -> ctx.variant_import
• ctx.namespace.item_import -> ctx.item_import
• ctx.namespace.self_import -> ctx.self_import
• ctx.namespace.variant_star_import -> ctx.variant_star_import
• ctx.namespace.star_import -> ctx.star_import
• ctx.namespace.find_items_for_type -> ctx.find_items_for_type
• ctx.namespace.resolve_call_path_with_visibility_check -> ctx.resolve_call_path_with_visibility_check
• ctx.namespace.resolve_type_with_self -> ctx.resolve_type_with_self (and the previous specialized version in ctx removed)
• ctx.namespace.resolve_type_without_self -> ctx.resolve_type_without_self (and the previous specialized version in ctx removed)

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).
• 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.