Parameterized temp dir used during a tarball install.

[robnk23]

What type of PR is this?

• [ ] bug
• [ ] cleanup
• [ ] documentation
• [x] feature

What this PR does / why we need it:

During a tarball install the rke2 executable will be run from a temporary directory created in the system default temp directroy (usually /tmp), which means the install will fail when /tmp is mounted with the noexec option.

This PR parameterizes the path to the parent directory of the temporary directory that gets created by adding the tarball_temp_dir variable, while leaving it to the system default if tarball_temp_dir is not specified.

Which issue(s) this PR fixes:

Fixes #172

Special notes for your reviewer:

N/A

Testing

Tested performing tarball installs with tarball_temp_dir undefined and defined to point to a path other than the system default temp dir.

Release Notes

Parameterized tmp dir used during a tarball install.

[zackbradys]

CC: @zackbradys @clemenko

[zackbradys]

I saw in previous PRs that the tests may not be working correctly? @mddamato @dgvigil?

[mddamato]

We fixed them. The tests should be working now. We'll take a look.

[mddamato]

fixed the tests in #176, once that's merged we can re-test and merge

[mddamato]

~@robnk23 could you rebase onto the new main?~ Never mind, I rebased for you