add needed php modules for page-stats

[bigfreak85]

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• I have read the contributing guideline and understand that I have made the correct modifications

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Description:

Added the needed PHP Modules for Page-Stats Plugin see https://github.com/francodacosta/grav-plugin-page-stats. The plugin takes over the needed config changes in the php.ini.

Benefits of this PR and context:

better support of 3rd party grav plugins.

How Has This Been Tested?

testet via universal-package-install
INSTALL_PACKAGES=php-pdo_sqlite|php-pdo

Source / References:

[github-actions]

Thanks for opening this pull request! Be sure to follow the pull request template!

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/grav/1.7.48-pkg-4b8f2259-dev-8574ef8145645a58824e06f5a8a32e0032c0c087-pr-50/index.html
https://ci-tests.linuxserver.io/lspipepr/grav/1.7.48-pkg-4b8f2259-dev-8574ef8145645a58824e06f5a8a32e0032c0c087-pr-50/shellcheck-result.xml

Tag	Passed
amd64-1.7.48-pkg-4b8f2259-dev-8574ef8145645a58824e06f5a8a32e0032c0c087-pr-50	✅
arm64v8-1.7.48-pkg-4b8f2259-dev-8574ef8145645a58824e06f5a8a32e0032c0c087-pr-50	✅

[aptalca]

Thanks for the PR.

Please add the packages in alphabetical order, add them to both Dockerfiles and add a changelog entry to readme-vars.yml

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/grav/1.7.48-pkg-d820ef00-dev-244c12b00f10bfbf8340144d0fc9ed28f0999cf3-pr-50/index.html
https://ci-tests.linuxserver.io/lspipepr/grav/1.7.48-pkg-d820ef00-dev-244c12b00f10bfbf8340144d0fc9ed28f0999cf3-pr-50/shellcheck-result.xml

Tag	Passed
amd64-1.7.48-pkg-d820ef00-dev-244c12b00f10bfbf8340144d0fc9ed28f0999cf3-pr-50	✅
arm64v8-1.7.48-pkg-d820ef00-dev-244c12b00f10bfbf8340144d0fc9ed28f0999cf3-pr-50	✅