- make `curl_dependency_option()` more generic.
- extend `CURL_BROTLI` and `CURL_ZSTD` options to accept
`AUTO` in addition to existing `ON` and `OFF`.
- change `CURL_BROTLI` and `CURL_ZSTD` option default
to `AUTO`. Was: `OFF`.
It brings cmake behavior closer to `./configure`.
Still different:
- `./configure` defaults to `off` which means to check default
locations. cmake checks more locations by default.
(Also tried `NO_CMAKE_PATH`, but then it checked less locations.)
- cmake returns both `brotlicommon` and `brotlidec` libs,
while `./configure` only returns the latter.
- ci: drop explicit cmake options, that are now unnecessary.
- GHA/configure-vs-cmake: make adjustments to make tests pass.
Closes#15431
f2adb3b6d7