What would you like to be added?

With the Go 1.24 upgrade (#19440), golangci-lint (specifically the usetesting linter) started raising many issues related to new test functions available in Go 1.24.

The changes are more or less:

146 files changed, 1157 insertions(+), 1212 deletions(-)

Because we couldn't solve the issues in Go 1.23 (functions don't exist yet), I disabled the linter. The idea is to create small pull requests that address each one of our submodules.

Completion tracking:

• client/pkg: address Go 1.24 usetesting issues #19576
• pkg: address Go 1.24 usetesting issues #19575
• client: address Go 1.24 usetesting issues #19589
• server: address Go 1.24 usetesting issues #19590
• etcdutl: address Go 1.24 usetesting issues #19591
• tests/common: address Go 1.24 usetesting issues #19592
• tests/e2e: address Go 1.24 usetesting issues #19593
• tests/framework: address Go 1.24 usetesting issues #19595
• tests/robustness: address Go 1.24 usetesting issues #19596

Why is this needed?

To reenable the linter, and help with code quality.