Reverts "Roll Flutter Engine from 0e7248d43251 to 0b0fab821536 (4 revisions)" (#140194)

Reverts flutter/flutter#140180
Initiated by: zanderso
This change reverts the following previous change:
Original Description:

https://github.com/flutter/engine/compare/0e7248d43251...0b0fab821536

2023-12-14 jonahwilliams@google.com [Impeller] distinguish between no clear color and transparent black clear color. (flutter/engine#49038)
2023-12-14 15619084+vashworth@users.noreply.github.com Unpin mac_toolchain version (flutter/engine#48994)
2023-12-14 30870216+gaaclarke@users.noreply.github.com [Impeller] Turned on new blur. (flutter/engine#48472)
2023-12-14 103135467+sealesj@users.noreply.github.com Remove unused metadata in DEPS from vuln scanning (flutter/engine#48995)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC jsimmons@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

bin/internal/engine.version

-0b0fab8215362f50a034d108ad11fbb8e93c3fce
+0e7248d43251a708e52842a772f9b2415c31a4ea