Revert moving off of LD SDK fork again (#36320)

See
[incident-984](https://materializeinc.slack.com/archives/C0B0FUQ9NP7).

There is a critical bug causing connections to be permanently broken
quite often, which is fixed in our fork, but is not fixed upstream even
on the latest version:
launchdarkly/rust-server-sdk#116

LD test from Nightly:
https://buildkite.com/materialize/nightly/builds/16253 (green)

Author: ggevay

Cargo.lock

@@ -377,8 +377,7 @@ junit-report = "0.8.3"
 k8s-controller = "0.10.0"
 k8s-openapi = { version = "0.27.0", features = ["schemars", "v1_32"] }
 kube = { version = "3.1.0", default-features = false, features = ["client", "derive", "openssl-tls", "runtime", "ws"] }
-launchdarkly-server-sdk = { version = "3.0.1", default-features = false, features = ["native-tls", "crypto-openssl"] }
-launchdarkly-sdk-transport = "0.1"
+launchdarkly-server-sdk = { version = "2.6.2", default-features = false }
 lgalloc = "0.6.0"
 libc = "0.2.184"
 lru = "0.16.3"
@@ -598,6 +597,9 @@ postgres_array = { git = "https://github.com/MaterializeInc/rust-postgres-array"
 # Waiting on https://github.com/MaterializeInc/serde-value/pull/35.
 serde-value = { git = "https://github.com/MaterializeInc/serde-value.git" }
 
+# Waiting for resolution of https://github.com/launchdarkly/rust-server-sdk/issues/116
+launchdarkly-server-sdk = { git = "https://github.com/MaterializeInc/rust-server-sdk", rev = "3e0a0b98b09a2970f292577a07e1c9382b65b5da" }
+
 # Waiting on https://github.com/edenhill/librdkafka/pull/4051.
 rdkafka = { git = "https://github.com/MaterializeInc/rust-rdkafka.git" }
 rdkafka-sys = { git = "https://github.com/MaterializeInc/rust-rdkafka.git" }

Cargo.toml

@@ -178,7 +178,6 @@ wrappers = [
     "globset",
     "launchdarkly-server-sdk",
     "launchdarkly-server-sdk-evaluation",
-    "launchdarkly-sdk-transport",
     "native-tls",
     "opendal",
     "os_info",

deny.toml

@@ -28,10 +28,10 @@ governor.workspace = true
 hex.workspace = true
 imbl.workspace = true
 http.workspace = true
+hyper-tls = "0.5.0"
 ipnet.workspace = true
 itertools.workspace = true
 launchdarkly-server-sdk.workspace = true
-launchdarkly-sdk-transport.workspace = true
 maplit.workspace = true
 mz-adapter-types = { path = "../adapter-types" }
 mz-audit-log = { path = "../audit-log" }