Test: Include CLI in Linux zip archive and support custom install locations

[Tyriar]

Test - @aeschli

Test plan for #4426

• Test zip archive
• Test .deb package
• Test .rpm package -

.zip test

Extract zip to ~ and attempt to launch with:

~/VSCode-linux-x64/bin/code-alpha

.deb/rpm test

Install package and attempt to launch with:

code-alpha
# and
/usr/share/code-alpha/bin/code-alpha