install.php: PHP 8.2 exception handler signature compatibility

[Deltik]

Motivation and Context

Fixes: #5072

Description

The exception handler parameter has to be of type Throwable, but we are remaining compatible with PHP 5.6, which didn't have Throwable, so let's fix this by moving the type to the phpDoc block.

How Has This Been Tested?

Human static code analysis?

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (a change to man pages or other documentation)

Checklist

• My code adheres to the e107 code style standard.
• I have read the contributing document.
• I have added tests to cover my changes.
• All new and existing tests pass.

[qlty-cloud-legacy]

Code Climate has analyzed commit c6401ff and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 0.0% (80% is the threshold).

This pull request will bring the total coverage in the repository to 34.7% (0.1% change).

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