Very significantly increase CI VM CPU Cores, RAM & disk (re. #2197)

This increases the size of the VM [used for CI](https://github.com/google/android-fhir/actions/workflows/build.yml) jobs runs from [GitHub's default](https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources) from / to:

* 2-core CPU (x86_64) => 64-cores
* 7 GB of RAM => 256 GB RAM
* 14 GB of SSD space => 2040 GB SSD

This should fix the `Error: The operation was canceled` problem described in issue #2197.

This is a worthwhile trade off of expensive engineering time VS infrastructure cost. Thank You Sundar for paying for this to enable this project to productively produce an Open Health Stack!

.github/workflows/build.yml

@@ -33,7 +33,7 @@ jobs:
   # Build will compile APK, test APK and run tests, lint, etc.
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04-64core
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps: