cmd/tsconnect: add -fast-compression option

Changes Gzip and Brotli to optimize for speed instead of size. This
signficantly speeds up Brotli, and is useful when iterating locally
or running the build during a CI job (where we just care that it
can successfully build).

Signed-off-by: Mihai Parparita <mihai@tailscale.com>

.github/workflows/cross-wasm.yml

@@ -34,7 +34,7 @@ jobs:
     - name: tsconnect static build
       # Use our custom Go toolchain, we set build tags (to control binary size)
       # that depend on it.
-      run: ./tool/go run ./cmd/tsconnect build
+      run: ./tool/go run ./cmd/tsconnect --fast-compression build
 
     - uses: k0kubun/action-slack@v2.0.0
       with: