mitransient v1.1.0

Refactors mitransient so that it's compatible with Mitsuba 3.6.X / Dr.Jit 1.0.X. This brings a (pretty noticeable) improvement in efficiency/execution time :)

How to upgrade:

• If you installed Mitsuba with pip, you can just pip install -U mitsuba==3.6.4. If you compiled Mitsuba from source, you will need to pull and recompile.
• If you're using y-tal you will need to update to >=0.19.0 (pip install -U y-tal==0.19.0)

Notes:

• Some parts have not been ported to Mitsuba 3.6.X yet. This includes spatial and temporal filtering of the renders, and the transient_prbvolpath integrator (i.e. participative media). We plan to also port these in a future update.
• If you need these for your work, or if you find any other issue, feel free to contact us.