Try Clad master

[guitargeek]

This is to see if problems that I see locally can be reproduced in the ROOT CI.

[github-actions]

Test Results

    23 files      23 suites   3d 5h 33m 39s ⏱️
 3 852 tests  3 846 ✅ 0 💤  6 ❌
71 888 runs  71 806 ✅ 0 💤 82 ❌

For more details on these failures, see this check.

Results for commit 498872b.

[guitargeek]

Regression confirmed and issue opened:

• Regression: crash when reverse-differentiating a nested function that has a #pragma clad checkpoint loop vgvassilev/clad#1931