build: use `configurehelp.pm.in` with autotools and cmake

Before this patch, each build tool generated `tests/configurehelp.pm`
manually.

Ref: https://github.com/curl/curl/pull/

build: use `configurehelp.pm.in` with autotools and cmake

Before this patch, each build tool generated `tests/configurehelp.pm`
manually.

Ref: https://github.com/curl/curl/pull/14802#issuecomment-2332734326
Closes #14819

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