feat: always declare a ts_project _types target to fetch dts files

[jbedard]

Sometimes the dts files need to be fetched, there is no reason this shouldn't be done when a transpiler is not being used.

This makes the declare targets more predictable.

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Changes are visible to end-users: yes

• Searched for relevant documentation and updated as needed: yes
• Breaking change (forces users to change their own code or config): no
• Suggested release notes appear below: yes

ts_project(name) declaration files can be fetched using the {name}_types target.

Test plan

• Covered by existing test cases
• New test cases added

[aspect-workflows]

Test

All tests were cache hits

140 tests (100.0%) were fully cached saving 10s.

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Buildifier      Format

[dzbarsky]

@jbedard disabled auto merge so you an address the comment

[jfirebaugh]

The docs in https://github.com/aspect-build/rules_ts/blob/main/docs/transpiler.md#macro-expansion should be updated to say that the [name]_types expansion is always generated.