Compositor: "Save as Render" for the file output node

This commit adds the "Save as Render" feature to the file output node,
that allows to disable the application of the configured view transform
and other color management settings on the image. If disable it uses
the standard view transform instead. This feature was originally
suggested in T83842 and is part of the color management improvements
task in T68926. With this feature it is possible to toggle the
application of the color management settings for each input socket
of the File Output node individually.

Reviewed By: brecht

Maniphest Tasks: T68926, T83842

Differential Revision: https://developer.blender.org/D9921

Fix T84588: Cache access in rna_Particle_uv_on_emitter

The function `rna_Particle_uv_on_emitter` did not handle the case where
`particle->num_dmcache` was `DMCACHE_ISCHILD`. This resulted in an
incorrect offset for the `mtface` pointer. The commit checks for the
case and sets the offset accordingly, similar to existing code in
e.g. `particle_calculate_parent_uvs`.

Reviewed By: JacquesLucke

Differential Revision: https://developer.blender.org/D10072

Fix T82988: Div by zero with curve deform modifier

In `calc_curve_deform` a factor is calculated without checking if
the divisior is zero or close to zero. This patch adds the missing
checks and sets the factor to zero if the division shouldn't be
computed.

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D9645

Fix T82988: Div by zero with curve deform modifier

In `calc_curve_deform` a factor is calculated without checking if
the divisior is zero or close to zero. This patch adds the missing
checks and sets the factor to zero if the division shouldn't be
computed.

Reviewed By: mont29

Differential Revision: https://developer.blender.org/D9645

Merge branch 'blender-v2.91-release'

Fix T81271: Fix crash in BLI_gzopen on Windows

Previously the return value of `ufopen` wasn't checked and if it failed,
`NULL` was passed into `fclose()` which resulted in a crash. This patch
avoids this by returning from `BLI_gzopen` when the file cannot be created.

Reviewed By: sebbas, iss

Differential Revision: https://developer.blender.org/D9576

Fix T82349: file extension not added to unpacked images

Ensure the appropriate extension is set when unpacking generated images
that don't have a filepath set.

Ref D9500

Fix T82423: Replace duplicate name in keymap

The two entries `TFM_MODAL_AUTOCONSTRAINT` and
`TFM_MODAL_AUTOCONSTRAINTPLANE` had the same name
displayed in the UI. The latter is now includes
"plane" in it's name.

Reviewed By: mano-wii

Differential Revision: https://developer.blender.org/D9474

Fix T82423: Add modifier key back into keymap

Commit rBf5080c82dd915db6c7b9dd68a52aaaccf2600137
accidentally remove the Shift modifier key from
the `AUTOCONSTRAINPLANE` shortcut.

Differential Revision: https://developer.blender.org/D9480

Fix T82423: Add modifier key back into keymap

Commit rBf5080c82dd915db6c7b9dd68a52aaaccf2600137
accidentally remove the Shift modifier key from
the `AUTOCONSTRAINPLANE` shortcut.

Differential Revision: https://developer.blender.org/D9480