Bug 1940172 - regenerate test certificates for 2025...

Bug 1940172 - regenerate test certificates for 2025 r=jschanck,necko-reviewers,kershaw,robwu,extension-reviewers a=test-only

* the certificates were regenerated using ./mach generate-test-certs
* the build/pgo/certs/ changes were made using ./mach python build/pgo/genpgocert.py
* the zip files in security/manager/ssl/tests/unit/test_signed_apps/ were updated per the directions in the corresponding moz.build file
* security/manager/ssl/tests/unit/test_cert_override_read.js was updated per the instructions in its output
* this text was copied and updated from the previous regeneration bug, bug 1874627

These certificates and other test artifacts will now expire in 2026.