Update project contact information for Wasmtime (#12559)

Remove some contributors who are no longer working on the project, and
additionally update the primary contact to the TSC of the Bytecode
Alliance which is the umbrella organization owning the project.

projects/wasmtime/project.yaml

@@ -1,15 +1,11 @@
 homepage: "https://wasmtime.dev/"
-primary_contact: "[email protected]"
+primary_contact: "[email protected]"
 auto_ccs:
   - "[email protected]"
   - "[email protected]"
   - "[email protected]"
-  - "[email protected]"
   - "[email protected]"
   - "[email protected]"
-  - "[email protected]"
-  - "[email protected]"
-  - "[email protected]"
   - "[email protected]"
   - "[email protected]"
 sanitizers: