[compiler-rt] [scudo] Apply filling option when realloc grows a block in-place too (PR #93212)

[Fabio D'Urso via llvm-commits]

fabio-d wrote:

Reverted in bddd8eae17df6511aee789744ccdc158de817081 because it broke buildbot https://lab.llvm.org/buildbot/#/builders/169/builds/32309

https://github.com/llvm/llvm-project/pull/93212