feat(sapi): expand SapiBuilder

[Qard]

I've expanded the SapiBuilder to cover most of the API surface area. This also includes tests to verify the struct fields are set properly.

Do we want some functionality tests too? That'll be a bit more work as it's a bit complicated to set up a fully-functional environment properly.

I also adjusted some more tests that needed the Embed::run(...) wrapper to be ZTS-safe. I can pull those out to a separate PR though, if you prefer.

[coveralls]

Pull Request Test Coverage Report for Build 16006197694

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 66 of 69 (95.65%) changed or added relevant lines in 1 file are covered.
• 748 unchanged lines in 21 files lost coverage.
• Overall coverage decreased (-0.3%) to 21.654%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/builders/sapi.rs	66	69	95.65%

Files with Coverage Reduction	New Missed Lines	%
crates/macros/src/parsing.rs	1	90.0%
src/builders/class.rs	1	57.14%
src/exception.rs	1	90.63%
src/zend/_type.rs	1	69.23%
src/embed/mod.rs	2	66.67%
src/types/iterator.rs	2	55.81%
src/closure.rs	4	9.38%
src/alloc.rs	5	66.67%
src/zend/try_catch.rs	5	80.0%
src/args.rs	7	81.4%

Totals
Change from base Build 15830961013:	-0.3%
Covered Lines:	830
Relevant Lines:	3833

---

💛 - Coveralls

[Qard]

@Xenira This is the main SAPI-related change I need to be able to drop my fork. How does this look? Anything more you'd want from it?

[Xenira]

@Qard Thank you. Was on vacation the past few days and need to catch up as a lot happened while I was away. Will have a look as soon as possible.

[Qard]

No worries. I hope it was a nice vacation! 🙂

[Xenira]

This looks really good. Thank you! Only have the nitpickiest of nitpicky comments.