One-side or two-side tests

[jjgao]

In both the Mutual Exclusivity tab and the Comparison page/tab, we use 1-side Fisher's Exact test. A user asked us whether a 2-side test is more appropriate. Let's consult statisticians.

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[inodb]

Got some feedback on this and raised a new ticket: https://github.com/cBioPortal/cbioportal/issues/9943. Turns out two-sided is more appropriate