[release/6.0] Add CodeQL3000 run to efcore-ci-official (#29439)

- backport of #29425 via #29438
- add new schedule for a weekly run
- add top-level parameter enabling CodeQL3000 in manual builds
- mix CodeQL3000 tasks into regular build; avoid large duplications
  - skip other jobs in CodeQL3000 runs
  - set `$(UseSharedCompilation)` to `false` to ease analysis
- add tag indicating CodeQL3000 tasks did useful work
  - ignore no-op task executions
- add a tsaoptions.json file
  - cribbed values from our eng/sdl-tsa-vars.config file

.config/tsaoptions.json

@@ -0,0 +1,12 @@
+{
+  "areaPath": "DevDiv\\Entity Framework",
+  "codebaseName": "efcore",
+  "instanceUrl": "https://devdiv.visualstudio.com/",
+  "iterationPath": "DevDiv",
+  "notificationAliases": [
+    "aspnetcore-build@microsoft.com"
+  ],
+  "projectName": "DEVDIV",
+  "repositoryName": "efcore",
+  "template": "TFSDEVDIV"
+}