Turns out we hadn't been running tests on `tvOS` for a while:
> [19:08:22]: Couldn't find any matching simulators for '["Apple TV
(15.2)"]' - falling back to default simulator
> [19:08:22]: Found simulator "iPhone 13 Pro (15.5)"

I found this went I went to dig into [this
failure](#1926 (comment)).
Turns out that wasn't running on `tvOS` anyway.

This turns them back on, fixes the compilation issues on `tvOS` tests,
and ensures that we don't run into this issue again.

### Changes:
- Renamed device in lane `test_tvos`
- Enabled `ensure_devices_found` on `iOS` and `tvOS` lanes. This will
also ensure that we don't stop running tests on iOS XX because it
doesn't find that simulator.
- Removed `UnitTestHostApp` storyboards and scene, since those aren't
supported in `tvOS`, and aren't needed because there's no UI.
- Made `StoreKitUnitTests` and `UnitTestHostApp` targets universal
- No longer linking `AdServices` on `tvOS` in test targets
- Disabled attribution tests on `tvOS`. Those methods weren't being
compiled, but we were testing that a message was being sent, even though
it no longer was.
- Changed iOS 14 tests to use Xcode 13 due to
xcpretty/xcode-install#466 (same as #1918).

Turns out we hadn't been running tests on `tvOS` for a while:
> [19:08:22]: Couldn't find any matching simulators for '["Apple TV
(15.2)"]' - falling back to default simulator
> [19:08:22]: Found simulator "iPhone 13 Pro (15.5)"

I found this went I went to dig into [this
failure](#1926 (comment)).
Turns out that wasn't running on `tvOS` anyway.

This turns them back on, fixes the compilation issues on `tvOS` tests,
and ensures that we don't run into this issue again.

### Changes:
- Renamed device in lane `test_tvos`
- Enabled `ensure_devices_found` on `iOS` and `tvOS` lanes. This will
also ensure that we don't stop running tests on iOS XX because it
doesn't find that simulator.
- Removed `UnitTestHostApp` storyboards and scene, since those aren't
supported in `tvOS`, and aren't needed because there's no UI.
- Made `StoreKitUnitTests` and `UnitTestHostApp` targets universal
- No longer linking `AdServices` on `tvOS` in test targets
- Disabled attribution tests on `tvOS`. Those methods weren't being
compiled, but we were testing that a message was being sent, even though
it no longer was.
- Changed iOS 14 tests to use Xcode 13 due to
xcpretty/xcode-install#466 (same as #1918).

The test introduced by #1926 passed locally, but sometimes failed in CI due to a race condition.

What we're testing is that the second request reuses the callback of the first one, **if called while the first one is still in progress**. However, nothing in the test ensures that's the case.
This introduces an optional delay in `MockHTTPClient` so we can ensure that.

_Note: because of the nature of these 2 tests, they don't actually wait for the whole response to finish, so they still pass in ~0.006s_

The test introduced by #1926 passed locally, but sometimes failed in CI
due to a race condition.

What we're testing is that the second request reuses the callback of the
first one, **if called while the first one is still in progress**.
However, nothing in the test ensures that's the case.
This introduces an optional delay in `MockHTTPClient` so we can ensure
that.

Another reason that test was failing randomly is because we had another
test modifying global state, which interferes with every other test. We
run tests in parallel, so it was making the new test that requires
`debug` logs to fail randomly, if this test happened to run before.

_Note: because of the nature of these 2 tests, they don't actually wait
for the whole response to finish, so they still pass in ~0.006s_

I blindly copy-pasted this snapshot and forgot that iOS 12 has different formatting. This was wrong in #1926.

It wasn't caught originally because we hadn't been running tests on iOS 12 until #1928.

I blindly copy-pasted this snapshot and forgot that iOS 12 has different
formatting. This was wrong in #1926.

It wasn't caught originally because we hadn't been running tests on iOS
12 until #1928.

**This is an automatic release.**

### New Features
* 🚨 `StoreKit 2` is now enabled by default 🚨 (#1922) via NachoSoto
(@NachoSoto)
* Extracted `PurchasesType` and `PurchasesSwiftType` (#1912) via
NachoSoto (@NachoSoto)
### Bugfixes
* `StoreKit 1`: changed result of cancelled purchases to be consistent
with `StoreKit 2` (#1910) via NachoSoto (@NachoSoto)
* `PaymentQueueWrapper`: handle promotional purchase requests from App
Store when SK1 is disabled (#1901) via NachoSoto (@NachoSoto)
### Other Changes
* Fixed iOS 12 tests (#1936) via NachoSoto (@NachoSoto)
* `CacheableNetworkOperation`: fixed race condition in new test (#1932)
via NachoSoto (@NachoSoto)
* `BasePurchasesTests`: changed default back to SK1 (#1935) via
NachoSoto (@NachoSoto)
* `Logger`: refactored default `LogLevel` definition (#1934) via
NachoSoto (@NachoSoto)
* `AppleReceipt`: refactored declarations into nested types (#1933) via
NachoSoto (@NachoSoto)
* `Integration Tests`: relaunch tests when retrying failures (#1925) via
NachoSoto (@NachoSoto)
* `CircleCI`: downgraded release jobs to Xcode 13.x (#1927) via
NachoSoto (@NachoSoto)
* `ErrorUtils`: added test to verify that `PublicError`s can be
`catch`'d as `ErrorCode` (#1924) via NachoSoto (@NachoSoto)
* `StoreKitIntegrationTests`: print `AppleReceipt` data whenever
`verifyEntitlementWentThrough` fails (#1929) via NachoSoto (@NachoSoto)
* `OperationQueue`: log debug message when requests are found in cache
and skipped (#1926) via NachoSoto (@NachoSoto)
* `GetCustomerInfoAPI`: avoid making a request if there's any
`PostReceiptDataOperation` in progress (#1911) via NachoSoto
(@NachoSoto)
* `PurchaseTester`: allow HTTP requests and enable setting `ProxyURL`
(#1917) via NachoSoto (@NachoSoto)