ci: format all YAML with `yq`

`yq` is the YAML query tool, used for manipulating YAML files. This
change uses the following command to read in and to pretty-print every
YAML file in this repository:

    for x in $(find . -name '*.yaml'); do
        yq -i -P -oy $x
    done

This makes it a bit easier to automate synchronisation between staging
and upstream, as yq always pretty-prints the entire document when
manipulating files.

Signed-off-by: Chris Kay <chris.kay@arm.com>
Change-Id: If973766fa26500d5320612422d1b4999b23439d3
diff --git a/tf-a-test-category-visualization.yaml b/tf-a-test-category-visualization.yaml
index 25ab201..0cf4497 100644
--- a/tf-a-test-category-visualization.yaml
+++ b/tf-a-test-category-visualization.yaml
@@ -1,33 +1,32 @@
 - job:
     name: tf-a-test-category-visualization
-    description: >-
-      Generates a visualization of TFTF tests by their test group and category.
+    description: Generates a visualization of TFTF tests by their test group and category.
     node: docker-amd64-tf-a-jammy
     concurrent: true
     properties:
-    - build-discarder:
-        days-to-keep: 30
+      - build-discarder:
+          days-to-keep: 30
     parameters:
-    - string:
-        name: CI_REFSPEC
-        default: +refs/heads/master:refs/remotes/origin/master
-    - string:
-        name: JOBS_REFSPEC
-        default: 'refs/heads/master'
-        description: |
-          tf-a-job-configs refspec to use. The master branch is used by default.
-    - string:
-        name: FILTER
-        default:
-        description: Optional job/group filter string (e.g. <code>juno</code>).
+      - string:
+          name: CI_REFSPEC
+          default: +refs/heads/master:refs/remotes/origin/master
+      - string:
+          name: JOBS_REFSPEC
+          default: refs/heads/master
+          description: |
+            tf-a-job-configs refspec to use. The master branch is used by default.
+      - string:
+          name: FILTER
+          default:
+          description: Optional job/group filter string (e.g. <code>juno</code>).
     builders:
-    - shell: !include-raw: scripts/clone.sh
-    - shell: |
-        mkdir -p output
+      - shell: !include-raw: scripts/clone.sh
+      - shell: |
+          mkdir -p output
 
-        cd tf-a-ci-scripts &&
-          bash script/graphs/categorize-tests.bash ${FILTER} \
-            > ../output.png 2> ../output.tsv
+          cd tf-a-ci-scripts &&
+            bash script/graphs/categorize-tests.bash ${FILTER} \
+              > ../output.png 2> ../output.tsv
     publishers:
-    - archive:
-        artifacts: output.*
+      - archive:
+          artifacts: output.*