tf-static-checks: introduce job

The proposed job (tf-static-checks) effectively superseed
'tf-a-static-checks.yaml', where besides the different names, the new
jobs is formatted similar as the recent migrated jobs and also
introduce a summary page as seen in [1].

This patch also fixes tf-main's static check job call, which now calls
the tf-static-checks job. Also, the static check code at
tf-a-builder is removed, leaving the latter job with the only purpose
of building (and nothing more).

[1] https://ci.staging.trustedfirmware.org/job/lsandov1-tf-static-checks/19/

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: Ic605ec8fe84445b080aa0dd38d4f85d289411656
diff --git a/tf-main.yaml b/tf-main.yaml
index b5f21f8..fbcbe8f 100644
--- a/tf-main.yaml
+++ b/tf-main.yaml
@@ -106,11 +106,9 @@
         name: Run static checks on the code
         condition: COMPLETED
         projects:
-        - name: tf-ci-gateway
+        - name: tf-static-checks
           current-parameters: true
           kill-phase-on: NEVER
-          predefined-parameters: |-
-            REPO_UNDER_TEST=trusted-firmware
           property-file: tf-a-env.param
 
     - multijob: