Allow for extension of `delta.security` access controls

[mdesmet]

Description

Allow delta.security access control to be extended by:

• making delta.security configurations string-based instead of a enum-based (new)
• providing an interface to implement AccessControlMetadata (removed in #11779)

Non-technical explanation

Release notes

(x) This is not user-visible and no release notes are required. ( ) Release notes are required, please propose a release note for me. ( ) Release notes are required, with the following suggested text:

# Section
* Fix some things. ({issue}`issuenumber`)

[findinpath]

Please add a mention about the new security setting similar as in connectors

https://github.com/trinodb/trino/blame/master/docs/src/main/sphinx/connector/atop.rst#L56-L59

[kokosing]

Please rebase. The failures you have got should be fixed by now.

[mdesmet]

@kokosing: Let's get this merged!

[kokosing]

Thanks!