Files with \r\n\n line endings can result in needing to renormalize twice, after deleting checked out file and restoring from repo

["Philip, Bevan" <Bevan.Philip@softwareag.com>]

Hello all,

I've experienced an odd bug/limitation with `git add --renormalize`, requiring me to run the command twice on a specific file. Here is a bug report.

What did you do before the bug happened? (Steps to reproduce your issue)

#!/bin/bash -x
printf "Test\\r\\r\\nTest Another Line\\r\\r\\nFinal Line\\r\\r\\n\\r\\r\\n" > git.bdf
printf "* text=auto\\n*.bdf text" > .gitattributes
mkdir test1
cd test1
git init
cp ../git.bdf .
git add .
git status
git commit -m "Add file git.bdf"
cp ../.gitattributes .
git add .gitattributes
git add --renormalize .
git status
git commit -m "Renormalize git.bdf"
git add --renormalize .
git status
rm git.bdf
git restore .
git add --renormalize .
git status

What did you expect to happen? (Expected behavior)
Only needing to renormalize the file once.

What happened instead? (Actual behavior)
Renormalize the file once, then renormalize again after deleting the file that is checked out on disk and restoring it from the object stored within the Git repo.

What's different between what you expected and what actually happened?
Needed to run the renormalize step again, after deleting the file checked out on disk and restoring the file from the object stored within the Git repo.

Anything else you want to add:
This only occurs for files with \r\r\n line endings (and possibly also ending the file with \r\r\n\r\n)

The file is in three states:
- Initial state: \r\r\n line endings within Git object
- Initial renormalization state: \r\n line endings within Git object
- Second renormalization state: \n line endings within Git object

Happens on both Windows and Linux (replicated on a fresh install of Git for Windows within Windows Sandbox). Additionally, tested with `next` trunk on Linux.
System info is for a Windows build where it does happen.

Directory, and file names should be irrelevant.

We encountered this naturally, with some files within a SVN repo we're migrating.

[System Info]
git version:
git version 2.36.1.windows.1
cpu: x86_64
built from commit: e2ff68a2d1426758c78d023f863bfa1e03cbc768
sizeof-long: 4
sizeof-size_t: 8
shell-path: /bin/sh
feature: fsmonitor--daemon
uname: Windows 10.0 19043
compiler info: gnuc: 11.3
libc info: no libc information available
$SHELL (typically, interactive shell): <unset>

Thanks,
Bevan
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