Consolidate Build & Test CI (#32929)

* Consolidate Build & Test CI

* Add missing workflow dependency

* Fix artifact name clash

* Fix playwright config

* Fix playwright_ew job

* Fix ed tests

* Fix playwright tags

* Iterate

* Fix file reads

* Fix sample-files paths

* Fix PW_TAG

* Fix blob report paths

* Delint

* Fix build-and-test.yaml

* Iterate

* Fix consentHomeserver.ts

* Simplify

* Iterate

* Delint

* Iterate

* Iterate

* Iterate

* Specify shell

* Simplify

* Delete apps/web/playwright/sample-files/index.ts

* Discard changes to apps/web/playwright/sample-files/index.ts

* Exclude playwright-common from coverage gate

* Attempt to speed up arm64 desktop test

* Revert "Attempt to speed up arm64 desktop test"

This reverts commit 8fa8ff0c785da6dad05bda938c8af24fa6af0451.

* Iterate

* Fix cache key

* Accept python or python3 as per node-gyp

* Accept python or python3 as per node-gypd

* Exclude apps/desktop/hak from coverage gate

apps/desktop/hak/matrix-seshat/check.ts

@@ -14,10 +14,7 @@ import type { Tool } from "../../scripts/hak/hakEnv.ts";
 import type { DependencyInfo } from "../../scripts/hak/dep.ts";
 
 export default async function (hakEnv: HakEnv, moduleInfo: DependencyInfo): Promise<void> {
-    const tools: Tool[] = [
-        ["rustc", "--version"],
-        ["python", "--version"], // node-gyp uses python for reasons beyond comprehension
-    ];
+    const tools: Tool[] = [["rustc", "--version"]];
     if (hakEnv.isWin()) {
         tools.push(["perl", "--version"]); // for openssl configure
         tools.push(["nasm", "-v"]); // for openssl building
@@ -28,6 +25,14 @@ export default async function (hakEnv: HakEnv, moduleInfo: DependencyInfo): Prom
     }
     await hakEnv.checkTools(tools);
 
+    try {
+        // node-gyp uses python for reasons beyond comprehension
+        await hakEnv.checkTools([["python", "--version"]]);
+    } catch {
+        // try python3 too
+        await hakEnv.checkTools([["python3", "--version"]]);
+    }
+
     // Ensure Rust target exists (nb. we avoid depending on rustup)
     await new Promise((resolve, reject) => {
         const rustc = childProcess.execFile(