Test updates for zstash rc5

[forsyth2]

Summary

Objectives:

• Address test issues found while testing Unified 1.12.0rc3 (zstash 1.5.0rc4)

Select one: This pull request is...

• a bug fix: increment the patch version
• a small improvement: increment the minor version
• a new feature: increment the minor version
• an incompatible (non-backwards compatible) API change: increment the major version

Small Change

• To merge, I will use "Squash and merge". That is, this change should be a single commit.
• Logic: I have visually inspected the entire pull request myself.
• Pre-commit checks: All the pre-commits checks have passed.

[forsyth2]

These are just test updates, so if no functional changes come in, zstash won't actually need a rc5.

[forsyth2]

I was running in to login problems while testing Perlmutter transferring to Perlmutter. I thought I had done that successfully before, but in any case, I don't really think this is an important case to worry about testing (i.e., there's not much of a need to Globus transfer files to the same machine).

[forsyth2]

I've completed testing on Chrysalis, Compy, Perlmutter, so I don't think there's anything more to add for this PR. Since this only touches files in tests/, there's no need for a new RC.