Make ILTypeDef interface calculation lazy

[DedSec256]

As stated in https://github.com/dotnet/fsharp/pull/16168

By analogy with custom attributes, reading interfaces is really time-consuming and ILTypeDef constructor is a public API but lacks the ability to pass lazy computation of interfaces.

This PR proposes the ability to pass lazy computation of interfaces to ILTypeDef constructor.

As evidence of the need for lazy calculation even for FCS default interfaces reading implementation, a benchmark was conducted for analysis of all files in ReSharper.FSharp/FSharp.Psi.Services with some additional unused opens, 48 files & 471 dll references required for project analysis were taken

Method	Mean	Error	StdDev	Gen0	Gen1	Gen2	Allocated
TypeCheckFiles - OLD	5.758 s	0.0510 s	0.0477 s	10000.0000	8000.0000	7000.0000	7.45 GB
TypeCheckFiles - NEW	5.302 s	0.0335 s	0.0332 s	4000.0000	2000.0000	1000.0000	7.02 GB

[github-actions[bot]]

:heavy_exclamation_mark: Release notes required

---

:white_check_mark: Found changes and release notes in following paths:

Change path	Release notes path	Description
src/Compiler	docs/release-notes/.FSharp.Compiler.Service/9.0.100.md

[DedSec256]

It appears that important conflicting changes have occurred during this time

[psfinaki]

@DedSec256 yes, likely due to nullness finally merged, sorry. Let us know if you need any help with conflicts.

[T-Gro]

@DedSec256 : Interface implementation can have attributes on it (not expressible in F#/C#, but in IL it is) and C# nullness metadata export makes use of it.

The nullness PR started to read it together with interface implementations, which will likely be the biggest conflict - let me know if you need any help with that.

Otherwise, once conflicts and CI are resolved, this should be good to be merged.

[DedSec256]

This PR probably requires changes to the API, so some work is still in progress.

[DedSec256]

In this PR, the interface implementations and their custom attributes have been combined into a single type InterfaceImpl, which should simplify both the usage of the API inside the compiler and its passing to the ILTypeDef constructor. Additionally, the type of the Implements property in ILTypeDef has been changed to InterruptibleLazy, as there are scenarios where it is necessary to check is metadata up to date, for which it is necessary to check whether the data has been computed or not (and there are already places in the AbstractIL API that expose lazy containers).

[vzarytovskii]

Converted to draft for now, lemme know if you need any help resolving issues/testing.

[DedSec256]

Benchmarks update

Method	Mean	Error	StdDev	Gen0	Gen1	Gen2	Allocated
TypeCheckFiles - Old (latest main)	6.212 s	0.0654 s	0.0611 s	38000.0000	21000.0000	12000.0000	7.3 GB
TypeCheckFiles - New	5.577 s	0.0376 s	0.0333 s	31000.0000	14000.0000	5000.0000	6.74 GB

[psfinaki]

Is this ready now @DedSec256? Nevermind one failing test, it's failing everywhere now.

[T-Gro]

Alex @DedSec256 , can I move it out of draft now that all is passing?

[psfinaki]

Thanks @DedSec256!