tests: removing uc16 executions (#14575)

* tests: removing uc16 executions

This task removes tests executions for uc16 but the support remains
because we need to test core snap for security releases.

Other changes are included to move some tests from uc16 to uc18.

* update tests to run in uc16

remodel-kernel to uc16-remodel-kernel

.github/workflows/test.yaml

@@ -290,11 +290,6 @@ jobs:
             systems: 'ubuntu-24.10-64'
             tasks: 'tests/...'
             rules: 'main'
-          - group: ubuntu-core-16
-            backend: google-core
-            systems: 'ubuntu-core-16-64'
-            tasks: 'tests/...'
-            rules: 'main'
           - group: ubuntu-core-18
             backend: google-core
             systems: 'ubuntu-core-18-64'
@@ -330,11 +325,6 @@ jobs:
             systems: 'ubuntu-fips-22.04-64'
             tasks: 'tests/fips/...'
             rules: 'main'
-          - group: nested-ubuntu-16.04
-            backend: google-nested
-            systems: 'ubuntu-16.04-64'
-            tasks: 'tests/nested/...'
-            rules: 'nested'
           - group: nested-ubuntu-18.04
             backend: google-nested
             systems: 'ubuntu-18.04-64'

tests/core/kernel-snap-refresh-on-core/task.yaml

@@ -5,8 +5,7 @@ details: |
     revision to a new one. It expects to find a new snap revision in the
     channel pointed by the NEW_CORE_CHANNEL env var.
 
-# TODO:UC20 enable for UC20/UC18
-systems: [ubuntu-core-16-64]
+systems: [ubuntu-core-*-64]
 
 manual: true
 

tests/core/remodel-kernel/task.yaml → tests/core/uc16-remodel-kernel/task.yaml

@@ -7,8 +7,6 @@ details: |
     the new kernel snap. Finally check it is possible to remodel
     back to the initial model.
 
-# FIXME: add core18 test as well
-# TODO:UC20: enable for UC20
 systems: [ubuntu-core-16-64]
 
 environment:

tests/lib/spread/backend.testflinger.beta.yaml

@@ -1,4 +1,4 @@
-    #this backend is used for edge validation
+    #this backend is used for beta validation
     testflinger:
         environment:
             TRUST_TEST_KEYS: "false"

tests/main/interfaces-gpio-memory-control/task.yaml

@@ -3,7 +3,7 @@ summary: Ensure that the gpio physical memory control interface works.
 details: |
     The gpio-memory-control interface allows read/write access to all gpio memory.
 
-systems: [ubuntu-core-16-arm-*]
+systems: [ubuntu-core-18-arm-32*]
 
 prepare: |
     echo "Given the test-snapd-gpio-memory-control snap is installed"