Resolve "Replace os.MkdirTemp() usages with t.TempDir()" (part 1)

This MR replaces os.MkdirTemp() usages with t.TempDir() without too much refactoring. There are a few os.MkdirTemp() usages remaining, but they'll require further work in order to replace.

Related:

• Replace os.MkdirTemp usages by t.TempDir (#696 - closed)
• internal/command/uploadarchive/uploadarchive_te... (#671)
• Resolve "Replace os.MkdirTemp usages by t.TempD... (!910 - merged)