fix(ci): remove extraneous caching (#10258)

- Removes the swift DerivedData cache. This was added to attempt to
speed up the Swift builds in CI but in reality, those are already fast
and the cache did not speed them up.
- Removes the runner.os/arch specifier from the Webview installer cache
key. The binary download is hardcoded for a specific windows version /
arch already so the cache key just adds unneeded complexity.

These caches are getting saved on PR runs which consumes excess GHA
cache storage.

scripts/tests/direct-download-packet-loss.sh

@@ -2,7 +2,7 @@
 
 source "./scripts/tests/lib.sh"
 
-client apk add --no-cache iproute2
+client apk add --no-cache --update iproute2
 client tc qdisc add dev eth0 root netem loss 20%
 
 client sh -c "curl --fail --output download.file http://download.httpbin/bytes?num=10000000" &

scripts/tests/lib.sh

@@ -20,7 +20,7 @@ function relay2() {
 
 function install_iptables_drop_rules() {
     # Install `iptables` to have it available in the compatibility tests
-    client apk add iptables
+    client apk add --update --no-cache iptables
 
     # Execute within the client container because doing so from the host is not reliable in CI.
     client iptables -A OUTPUT -d 172.28.0.105 -j DROP

scripts/tests/tcp-dns.sh

@@ -2,7 +2,7 @@
 
 source "./scripts/tests/lib.sh"
 
-client sh -c "apk add bind-tools" # The compat tests run using the production image which doesn't have `dig`.
+client sh -c "apk add --update --no-cache bind-tools" # The compat tests run using the production image which doesn't have `dig`.
 
 echo "Resolving DNS resource over TCP with search domain"
 client sh -c "dig +search +tcp dns"