Description of the problem / feature request:

A common and annoyingly redundant pattern is:

constraint_value(
    name = "my_value",
    constraint_setting = "my_setting")

config_setting(
    name = "my_value_selectable",
    constraint_values = [":my_value"])

some_rule(
    ...,
    attr = select({
        ":my_value_selectable": ...
    })

It would be nice to be able to just write:

some_rule(
    ...,
    attr = select({
        ":my_value": ...
    })

Feature requests: what underlying problem are you trying to solve with this feature?

Unnecessary bloat for situations where config_setting is just abstraction overhead.

Have you found anything relevant by searching the web?

Examples:

• https://github.com/bazelbuild/rules_rust/blob/5ec0b832d6a7a7ad183cfb9fb99ff2cf91429caa/rust/platform/platform.bzl#L59-L67
• https://github.com/bazelbuild/rules_dotnet/blob/07ee724341d5bd70e41c6980ee202a282ccb3462/dotnet/platform/list.bzl#L77-L82

Also see #7668 and bazelbuild/bazel-skylib#89 (comment).