fix: Correctly detect local binary when installing via npm

[kamilogorek]

This fixes the nasty issue when using npm to install cli with locally existing binary.
which iterates over all possible binaries available in the PATH, and by default it reports the first occurrence.
This is however problematic when using npm since I believe v8, as they started to include all node_modules/.bin in the PATH when executing npm script, making npm run install detect the bin/sentry-cli file that we have, which is just a JS proxy to the actual binary.
It works fine when running install script directly in node or using yarn, as they don't modify the PATH.

We want the last possible match, eg.

/Users/kamilogorek/Desktop/tmp-cli/node_modules/.bin/sentry-cli,/usr/local/bin/sentry-cli