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ARROW-12354: [Packaging][RPM] Use apache.jfrog.io/artifactory/ instead of apache.bintray.com/

Closes #10007 from kou/packaging-linux-yum-artifactory

Authored-by: Sutou Kouhei <kou@clear-code.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>