[R][CI] Link order when not using pkg-config is wrong
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Component: Continuous Integration
Component: R
Type: bug
- Dominant language
- C++
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Description
### Describe the bug, including details regarding any error messages, version, and platform.
As kou discovered in https://github.com/apache/arrow/issues/43337#issuecomment-2241297521 the link order in r/configure is wrong when not using pc as `libarrow_dataset` depends on `libarrow_acero`. So the order `-larrow_dataset -larrow_acero` is correct.
While we do have ci jobs using `ARROW_USE_PKG_CONFIG=false` the logic in configure mostly uses `PKG_CONFIG_AVAILABLE` which is only based on the availability of the `pkg-config` utility, this does not match what is documented and prevents our CI jobs to run the non-pc code paths.
### Component(s)
Continuous Integration, R
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