ci: add KAS configuration files for QCS615 IQ EVK Board

Add KAS configuration file and update GitHub workflows to build
QCS615 IQ EVK board in CI.

Signed-off-by: Wu Fang <[email protected]>

Author: Wu Fang

.github/workflows/build-yocto.yml

@@ -111,6 +111,7 @@ jobs:
           - iq-9075-evk
           - qcm6490-idp
           - qcs615-adp-air
+          - iq-615-evk
           - qcs8300-ride-sx
           - qcs9100-ride-sx
           - qrb2210-rb1-core-kit

ci/iq-615-evk.yml

@@ -0,0 +1,8 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/siemens/kas/master/kas/schema-kas.json
+
+header:
+  version: 14
+  includes:
+  - ci/base.yml
+
+machine: qcs615-iq-615-evk