Fix ICE when checking overloaded call with wrong arity #18109
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When an overloaded call expression has parameters but the function object takes none, construct an array of formal argument types with the arity of the call expression so that we don't fail by indexing out of bounds later. Closes #16939
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fix: Extend `type_variable_table` when modifying index is larger than the table size Fixes rust-lang#18109 Whenever we create an inference variable in r-a, we extend `type_variable_table` to matching size here; https://github.com/rust-lang/rust-analyzer/blob/f4aca78c92e03354327c8f6c7fefaef9f45ab166/crates/hir-ty/src/infer/unify.rs#L378-L381 But sometimes, an inference variable is [created from chalk](https://github.com/rust-lang/chalk/blob/ab710e0c9b455403b138ef72a2fb90967a58eff3/chalk-solve/src/infer/unify.rs#L743) and passed to r-a as a type of an expression or a pattern. If r-a set diverging flag to this before the table is extended to a sufficient size, it panics here; https://github.com/rust-lang/rust-analyzer/blob/f4aca78c92e03354327c8f6c7fefaef9f45ab166/crates/hir-ty/src/infer/unify.rs#L275-L277 I think that extending table when setting diverging flag is reasonable becase we are already doing such extending to a size that covers the inference vars created from chalk and this change only covers the order-dependent random cases that this might fail
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Closes #16939