Remove cacerts bundled in Joomla and replace with composer package

[wilsonge]

Summary of Changes

Replaces the outdated cacerts bundled with Joomla HTTP and FOF Download with the latest versions (from 2015 and 2017 respectively)

Testing Instructions

Ensure that the HTTP Package and Downloads package continue to function and use the updated CA Trust

Documentation Changes Required

None

[HLeithner]

I would like to move this to 3.9.29 (3.9.28 is ready for building final packages) or better 3.10 you remove the old files which could lead to a failure for 3rd party packages depending on the file location.

Maybe it would be better to maintain the 2 files with a composer post update script till EOL of 3.10.

[Fedik]

I think @HLeithner is right,
Will be a bad idea to remove this files while 3.9.x.

But, maybe, can add the bundle in parallel :)

[HLeithner]

I merged #34693 so 3.9.28 has a up to date version.

[wilsonge]

Closing as alternate PR was merged - if this is a b/c break then it's useless. We can't use composer hooks to update the files because we don't autoload our code with composer in staging.