ci: Disable freedreno CI on the 20.0 stable branch.

We need to repurpose all the chezas to bare-metal testing as we extend
master to doing trace testing and more VK testing.  I honestly thought the
docker db410cs had already all been transitioned already.  Unfortunately,
backporting all the CI changes from master to 20.0 looks painful.  We
haven't been doing much backporting in freedreno land, so hopefully this
doesn't risk too much regression for these boards.
34 jobs for !5549 with 20.0-ci-disable-freedreno in 18 minutes and 49 seconds (queued for 8 seconds)
latest detached
Status Job ID Name Coverage
  Container
passed #3178169
aarch64
arm_build

00:00:54

passed #3178171
aarch64
arm_test

00:00:25

passed #3178163
x86_build

00:00:45

passed #3178167
x86_build_old

00:00:22

passed #3178165
x86_test-gl

00:00:33

 
  Build
passed #3178179
aarch64
meson-arm64

00:08:38

passed #3178181
aarch64
meson-arm64-build-test

00:08:40

passed #3178177
aarch64
meson-armhf

00:10:53

passed #3178184
meson-clang

00:09:11

passed #3178190
meson-clover

00:08:17

passed #3178192
meson-clover-old-llvm

00:05:06

passed #3178196
meson-i386

00:04:49

passed #3178175
meson-main

00:08:58

passed #3178198
meson-mingw32-x86_64

00:05:34

passed #3178173
meson-testing

00:07:36

passed #3178194
meson-vulkan

00:05:33

passed #3178200
scons

00:09:31

passed #3178202
scons-old-llvm

00:05:40

passed #3178186
scons-swr

00:07:41

passed #3178188
scons-win64

00:09:14

 
  Test
passed #3178204
mesa-ci-aarch64-lava-collabora
panfrost-t720-test:arm64

00:07:47

passed #3178205
mesa-ci-aarch64-lava-collabora
panfrost-t760-test:armhf

00:05:19

passed #3178208
mesa-ci-aarch64-lava-collabora
panfrost-t860-test:arm64

00:04:33

passed #3178211
piglit-glslparser

00:03:31

passed #3178209
piglit-quick_gl

00:06:57

passed #3178213
piglit-quick_shader

00:04:24

passed #3178215
test-llvmpipe-gles2

00:04:22

passed #3178216
test-softpipe-gles2

00:02:06

passed #3178221
test-softpipe-gles31 1/4

00:02:14

passed #3178218
test-softpipe-gles3 1/2

00:03:49

passed #3178222
test-softpipe-gles31 2/4

00:10:20

passed #3178224
test-softpipe-gles31 3/4

00:03:49

passed #3178226
test-softpipe-gles31 4/4

00:02:34

passed #3178219
test-softpipe-gles3 2/2

00:05:32