`damlc docs` generates wrong links for Types from stdlib

When using daml damlc docs to generate documentation from DAML code, types like Text (from stdlib) used to have a link leading to their description in the SDK documentation. Since SDK 1.1.0 the anchors in the links are not valid any more, the link only leads to the start page of the stdlib documentation. The split into separate files per module in https://github.com/digital-asset/daml/pull/5636 has probably caused this.

To see the issue, run the following commands:

$ daml new test-damldoc
$ cd test-damldoc
$ daml damlc docs daml/Maiin.daml -o test
$ cat test/Main.md

The generated Main.md will contain a link [Text](https://docs.daml.com/daml/stdlib/index.html#type-ghc-types-text-57703) which should instead be https://docs.daml.com/daml/stdlib/Prelude.html#type-ghc-types-text-57703

[sofiafaro-da]

@shayne-fletcher’s work in #6386 adds the --input-anchor flag and distributes the stdlib anchor table in the damlc runfiles. The only thing missing is to make the anchor table shipped with damlc be used by default.

[akrmn]

While working on https://github.com/digital-asset/daml/pull/15446 I found that

The only thing missing is to make the anchor table shipped with damlc be used by default.

is still missing