Adding test for legacy checkpoint created with 2.5.4 (#21128)

[create-pull-request] automated change

Co-authored-by: Borda <[email protected]>
Co-authored-by: Jirka Borovec <[email protected]>

Author: pl-ghost

tests/legacy/back-compatible-versions.txt

@@ -107,3 +107,4 @@
 2.5.1
 2.5.2
 2.5.3
+2.5.4