Paywalls: reference test snapshots from submodule (#3115)

See https://github.com/RevenueCat/purchases-ios-snapshots

.circleci/config.yml

@@ -155,6 +155,11 @@ commands:
           paths:
             - vendor/bundle
 
+  update-submodules:
+    steps:
+      - run: git submodule sync
+      - run: git submodule update --init
+
   compress_result_bundle:
     parameters:
       directory:
@@ -333,6 +338,7 @@ jobs:
     <<: *base-job
     steps:
       - checkout
+      - update-submodules
       - update-spm-installation-commit
       - run:
           name: SPM RevenueCatUI Tests
@@ -359,6 +365,7 @@ jobs:
     <<: *base-job
     steps:
       - checkout
+      - update-submodules
       - update-spm-installation-commit
       - run:
           name: SPM RevenueCatUI Release Build
@@ -392,6 +399,7 @@ jobs:
     <<: *base-job
     steps:
       - checkout
+      - update-submodules
       - update-spm-installation-commit
       - run:
           name: SPM RevenueCatUI Tests

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "purchases-ios-snapshots"]
+	path = purchases-ios-snapshots
+	url = git@github.com:RevenueCat/purchases-ios-snapshots.git

Package.swift

@@ -80,7 +80,7 @@ let package = Package(
                         "Nimble",
                         .product(name: "SnapshotTesting", package: "swift-snapshot-testing")
                     ],
-                    exclude: ["Templates/__Snapshots__"],
+                    exclude: ["Templates/__Snapshots__", "Data/__Snapshots__", "TestPlans"],
                     resources: [.copy("Resources/header.jpg"), .copy("Resources/background.jpg")])
     ]
 )

Tests/RevenueCatUITests/Templates/__Snapshots__

@@ -0,0 +1 @@
+../../../purchases-ios-snapshots/Templates/__Snapshots__