qa/distros/supported: update centos_latest.yaml and add centos_8.stream.yaml

Signed-off-by: Casey Bodley <cbodley@redhat.com>

diff --git a/qa/distros/supported/centos_8.stream.yaml b/qa/distros/supported/centos_8.stream.yaml
new file mode 120000 (symlink)
index 0000000..e96091b
--- /dev/null
+++ b/qa/distros/supported/centos_8.stream.yaml
@@ -0,0 +1 @@
+../all/centos_8.stream.yaml
\ No newline at end of file

diff --git a/qa/distros/supported/centos_latest.yaml b/qa/distros/supported/centos_latest.yaml
index b7e6c9b4e546120d9e1d407382e2d8a94e2bc8a3..2e29883f31c362b27d2a9c6f886dd0633470282b 120000 (symlink)
--- a/qa/distros/supported/centos_latest.yaml
+++ b/qa/distros/supported/centos_latest.yaml
@@ -1 +1 @@
-../all/centos_8.yaml
\ No newline at end of file
+../all/centos_latest.yaml
\ No newline at end of file