[GSoC 2025] Templated Hooks - Weekly Update #7

[AlbertG]

This week I have have tinkered with Dennis' old draft PR for 
templatization of `_d_arrayliteralTX` [1], and found the issue 
that prevented it from being merged, as discussed in my PR [2].

In a separate PR [3], I have also refactored the code for 
`_d_arrayliteralTX`, cleaning up the code and removing the old 
function instance from `rt/lifetime.d`.

[1] https://github.com/dlang/dmd/pull/21077
[2] https://github.com/dlang/dmd/pull/21567
[3] https://github.com/dlang/dmd/pull/21573