refactor: fix remaining typescript strict flag failures (#30993)

Fixes the remaining TypeScript --strict flag failures for source
files which are not part of any specific release package.

PR Close #30993

packages/http/BUILD.bazel

@@ -10,6 +10,9 @@ ng_module(
             "src/**/*.ts",
         ],
     ),
+    # Disable building with strict compatibility as the http package is no longer
+    # maintained and therefore not needed to be made compatible with --strict.
+    tsconfig = "//packages:tsconfig-build-no-strict",
     deps = [
         "//packages/core",
         "//packages/platform-browser",