"phpunit.args" option causing args to be appended multiple times

[zjbarg]

Repro

1. Add "phpunit.args": ["--no-coverage"] to settings.json
2. Run a test using the extension twice

Outcome

The --no-coverage is appended to the run command an extra time with each run. (5 runs adds --no-coverage 5 times)
1) Option --no-coverage cannot be used more than once warning message
…

Expected outcome

Not to append the same arg multiple times.

Logs / output / settings

Settings.json

{
    "phpunit.args": ["--no-coverage"]
}

phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>
<phpunit
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/11.2/phpunit.xsd"
    bootstrap="vendor/autoload.php"
    cacheDirectory=".phpunit.cache"
    executionOrder="depends,defects"
    requireCoverageMetadata="true"
    beStrictAboutCoverageMetadata="true"
    beStrictAboutOutputDuringTests="true"
    failOnRisky="true"
    failOnWarning="true"
>
    <testsuites>
        <testsuite name="myTestSuite">
            <directory>tests/Unit</directory>
        </testsuite>
    </testsuites>

    <source ignoreIndirectDeprecations="true" restrictNotices="true" restrictWarnings="true">
        <include>
            <directory>src</directory>
        </include>
    </source>
</phpunit>

Terminal

 *  Executing task: '/Users/zjbarg/code/foo-project/vendor/bin/phpunit' --colors=always --filter 'SomeTest' --no-coverage --no-coverage --no-coverage '/Users/zjbarg/code/foo-project/tests/some-directory/SomeTest.php' 

PHPUnit 11.2.8 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.3.6
Configuration: /Users/zjbarg/code/foo-project/phpunit.xml

.                                                                   1 / 1 (100%)

Time: 00:00.002, Memory: 8.00 MB

There was 1 PHPUnit test runner warning:

1) Option --no-coverage cannot be used more than once

WARNINGS!
Tests: 1, Assertions: 1, Warnings: 1.

 *  The terminal process "/bin/zsh '-l', '-c', ''/Users/zjbarg/code/foo-project/vendor/bin/phpunit' --colors=always --filter 'SomeTest' --no-coverage --no-coverage --no-coverage '/Users/zjbarg/code/foo-project/tests/some-directory/SomeTest.php''" failed to launch (exit code: 1). 
 *  Terminal will be reused by tasks, press any key to close it. 

Environment	Values
Extension version	v4.16.1
Operating system	macOS