Upgrade infrastructure to Go 1.18 without requiring it (#2976)

.github/workflows/default.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: ^1.17
+        go-version: ^1.18
       id: go
 
     - name: Set up Node

.github/workflows/nightly.yml

@@ -83,7 +83,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: ^1.17
+        go-version: ^1.18
       id: go
 
     - name: Set up Node

.github/workflows/release.yml

@@ -63,7 +63,7 @@ jobs:
     - name: Setup Go
       uses: actions/setup-go@v2
       with:
-        go-version: ^1.17
+        go-version: ^1.18
       id: go
 
     - name: Setup Node