PHPLIB-1113: Update to psalm 5

[alcaeus]

PHPLIB-1113

This is necessary to better support array/object shapes for the codec pull request, and is necessary to get updated stub maps when we add stubs for new BSON classes to the map for ext-mongodb.

I have fixed the easy-to-fix errors, and a number of template errors (mostly relating to iterators) have been added to the baseline. The additional config values for findUnusedBaselineEntry and findUnusedCode are set to the current default value (false) in anticipation of those defaults changing to true in psalm 6. All of these issues can be revisited separately at a later date.

[jmikola]

Note the two "Unchanged files with check annotations" errors in the diff.

• src/functions.php:84:12: MixedInferredReturnType: Could not verify return type 'array<array-key, mixed>|object' for MongoDB\apply_type_map_to_document (see https://psalm.dev/047)
• src/functions.php:93:12: MixedReturnStatement: Could not infer a return type (see https://psalm.dev/138)

[jmikola]

Interesting that this wasn't caught by the phpcbf: fix RequireOneLineDocComment commit in #1058. I suppose that only applied when the doc block contained annotations.

[jmikola]

@alcaeus: The following should explain the various CI failures. IMO only the last paragraph needs to be addressed in this PR (sorry for missing that with my previous LGTM).

The one GitHub Action failure is related to libmongoc using QEv2 and running against a pre-7.0 server that still requires QEv1. Two related operations were aborted prematurely after the first task failed, so I can't discern what their exactl failures are but we can assume it's related.

I do see a few Evergreen test failures related to what I'm tracking in PHPLIB-1115 (snapshot queries doc example).

Most of the Evergreen task failures pertain to CSFLE spec/prose tests. Those should be addressed by #1063 for PHPLIB-1088, which will skip the tests until they are implemented in PHPLIB-878.

At least two Evergreen task failures (example) are failing due to a Composer requirement conflict. I think this is for the PHP 7.2 and 7.3 environments:

Your requirements could not be resolved to an installable set of packages.
Problem 1
     - vimeo/psalm[5.0.0, ..., 5.9.0] require php ^7.4 || ~8.0.0 || ~8.1.0 || ~8.2.0 -> your php version (7.2.34) does not satisfy that requirement.
     - Root composer.json requires vimeo/psalm ^5 -> satisfiable by vimeo/psalm[5.0.0, ..., 5.9.0].

[alcaeus]

Closing this PR to avoid shenanigans with composer.json to retain support for PHP 7.2 and 7.3 while also supporting psalm 5 which requires PHP 7.4. We'll revisit this after dropping support for PHP 7.2 and 7.3.