ABC-365 CI: HDRP tests fail in trunk on all platforms because of a coding package error (#526)

* Remove coding package from AlembicHDRP and AlembicStandaloneBuild project's manifest.json

* Keep other package versions unchanged

TestProjects/AlembicHDRP/Packages/manifest.json

@@ -2,7 +2,6 @@
   "dependencies": {
     "com.unity.analytics": "3.3.5",
     "com.unity.burst": "1.4.3",
-    "com.unity.coding": "0.1.0-preview.17",
     "com.unity.formats.alembic": "file:../../../com.unity.formats.alembic",
     "com.unity.ide.rider": "1.2.1",
     "com.unity.ide.visualstudio": "2.0.0",

TestProjects/AlembicStandaloneBuild/Packages/manifest.json

@@ -1,6 +1,5 @@
 {
   "dependencies": {
-    "com.unity.coding": "0.1.0-preview.17",
     "com.unity.formats.alembic": "file:../../../com.unity.formats.alembic",
     "com.unity.ide.rider": "1.1.4",
     "com.unity.package-validation-suite": "0.4.0-preview.12",