protobuf: Update to version 28.3

protobuf: Update to version 28.3

- Update from version 28.1 to 28.3
- Update of rootfile
- Changelog
    28.3
	C++
	    Fix packed reflection handling bug in edition 2023. (#18405) (c4124f9)
	Java
	    Mute the minor version warning #18096 (#18923) (fe30f9a)
	    Populate Kotlin Manifest Files (#18859) (d82fb47)
	    Re-export includingDefaultValueFields in deprecated state for important
	     Cloud customer. (3b62d78)
	    Cherrypick restoration of mutableCopy helpers (3ea568a)
	    Fix packed reflection handling bug in edition 2023. (#18405) (c4124f9)
	Kotlin
	    Populate Kotlin Manifest Files (#18859) (d82fb47)
	Python
	    Mute the minor version warning #18096 (#18923) (fe30f9a)
	    Fix packed reflection handling bug in edition 2023. (#18405) (c4124f9)
	Other
	    Fix merge conflicts (664a7e1)
	    [ObjC] Disabling visionOS on CI. (22cd8ba)
	    Update staleness tests to only run over release branch (#18398) (8e94b14)
    28.2
	C++
	    Fix cord handling in DynamicMessage and oneofs. (#18373) (5b0e543)
	Java
	    Add recursion check when parsing unknown fields in Java. (ac9fb5b)

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>