build: uses setup-go@v3 to simplify cache config

This updates to setup-go@v3 which is the only updated version (v2 last
updated in feb), and employs its cache to simplify workflow
configuration.

Notably, we can't do this for Alpine until #3146

Signed-off-by: Adrian Cole <adrian@tetrate.io>

.github/workflows/build-macos.yml

@@ -16,10 +16,6 @@ jobs:
     name: build-macos
     runs-on: macos-11
     steps:
-      - name: Install Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: '1.18.1'
       - name: Install Dependencies
         shell: bash
         run: |
@@ -35,6 +31,11 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: true
+      - name: Install Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: '1.18.1'
+          cache: true
       - name: Cache LLVM source
         uses: actions/cache@v3
         id: cache-llvm-source
@@ -104,23 +105,17 @@ jobs:
     name: homebrew-install
     runs-on: macos-latest
     steps:
-      - name: Install Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: '1.18'
       - name: Install LLVM
         shell: bash
         run: |
           HOMEBREW_NO_AUTO_UPDATE=1 brew install llvm@14
       - name: Checkout
         uses: actions/checkout@v2
-      - name: Cache Go
-        uses: actions/cache@v3
+      - name: Install Go
+        uses: actions/setup-go@v3
         with:
-          key: go-cache-macos-homebrew-v1-${{ hashFiles('go.mod') }}
-          path: |
-            ~/Library/Caches/go-build
-            ~/go/pkg/mod
+          go-version: '1.18'
+          cache: true
       - name: Build TinyGo
         run: go install
       - name: Check binary