Remove deprecated Client wrapper

[StantonMatt]

Summary

• Remove the deprecated Overtrue\PHPLint\Client wrapper.
• Pass application version context directly from LintCommand into Linter.
• Cover that the command still exposes short/long application versions in LinterOutput context.

Fixes #235

Verification

• vendor/bin/phpunit --no-progress --testdox --do-not-cache-result
• vendor/bin/phpstan analyse --no-progress
• php bin/phplint src tests --exclude fixtures --no-cache --no-configuration --no-progress
• git diff --check

[llaville]

@StantonMatt Sorry, this time, I won't apply your patch.

Reason, I'm working on version 9.8, and a quick fix was already applied on branch 9.8 : see #235

I won't apply it directly to the main branch (current 9.7.x versions)

[StantonMatt]

Understood, thanks for the context. I'll leave main alone here.