Bug 1950484 - Speed up ts check by caching .tsbuildinfo r=Standard8

Also add *.tsbuildinfo to .gitignore and .hgignore

Differential Revision: https://phabricator.services.mozilla.com/D240753

.hgignore

@@ -15,6 +15,7 @@
 \.gcda$
 \.gcno$
 \.gcov$
+\.tsbuildinfo$
 (^|/)compile_commands\.json$
 
 # Ignore ID generated by idutils.
@@ -160,7 +161,6 @@ _OPT\.OBJ/
 ^devtools/client/debugger/assets/module-manifest\.json
 
 # Ignore node_module directories and npm artifacts
-^remote/test/puppeteer/.*/.*\.tsbuildinfo
 ^remote/test/puppeteer/.*/lib/
 ^remote/test/puppeteer/.*/node_modules/
 ^remote/test/puppeteer/.*/\.wireit/