Update QUICHE from aaf48d2e5 to 3c9db14bb (envoyproxy#37128)

https://github.com/google/quiche/compare/aaf48d2e5..3c9db14bb

```
$ git log aaf48d2e5..3c9db14bb --date=short --no-merges --format="%ad %al %s"

2024-11-13 davidben Add missing dependency to quiche_test_support
2024-11-13 ricea Rename QuicTag kIFWA to kIFWa
2024-11-12 rch Remove unused TPCC QuicTag and rename the variables * kORBT -> kOBIT * kMIBS -> kMIDS to match their on-the-wire value.
2024-11-12 rch Deprecate --gfe2_reloadable_flag_quic_allow_host_in_request2.
2024-11-12 birenroy Allows a unit test to be exported as part of QUICHE.
2024-11-12 martinduke Change protection scheme for code that marks outgoing ECT.
2024-11-11 wub Change `QuicUnackedPacketMap::NotifyFramesAcked` and `QuicUnackedPacketMap::MaybeAggregateAckedStreamFrame` to take `QuicTransmissionInfo*&` as a input-output parameter.
2024-11-08 martinduke Add ECN counters to ACKs sent by the QuicBufferedPacketStore.
2024-11-07 rch Rename gfe2_restart_flag_quic_support_flow_label to gfe2_restart_flag_quic_support_flow_label2 now that QUIC flow label support seems to be complete.
2024-11-05 birenroy Adds backslash `\` to the list of characters allowed in a HTTP request path.
2024-11-05 rch Add support for sending IPv6 flow labels to QuicGsoBatchWriter
2024-11-05 birenroy Simplifies and modernizes SpdyDataIR.
2024-11-04 dschinazi Update googleurl in QUICHE bazel build
```

and update `bazel/external/quiche.BUILD` to add
`quiche/quic/core/flow_label.h`.

Risk Level: low
Testing: ci

---------

Signed-off-by: Alejandro R. Sedeño <asedeno@google.com>

bazel/external/quiche.BUILD

@@ -1945,6 +1945,7 @@ envoy_cc_library(
     tags = ["nofips"],
     visibility = ["//visibility:public"],
     deps = [
+        ":flow_label_lib",
         ":quic_core_batch_writer_batch_writer_base_lib",
         ":quic_core_linux_socket_utils_lib",
         ":quic_platform",
@@ -4263,6 +4264,11 @@ envoy_quic_cc_library(
     ],
 )
 
+envoy_quic_cc_library(
+    name = "flow_label_lib",
+    hdrs = ["quiche/quic/core/flow_label.h"],
+)
+
 envoy_cc_library(
     name = "quic_core_udp_socket_lib",
     srcs = select({
@@ -4285,6 +4291,7 @@ envoy_cc_library(
     repository = "@envoy",
     tags = ["nofips"],
     deps = [
+        ":flow_label_lib",
         ":quic_core_io_socket_lib",
         ":quic_core_types_lib",
         ":quic_core_utils_lib",

bazel/repository_locations.bzl

@@ -1225,12 +1225,12 @@ REPOSITORY_LOCATIONS_SPEC = dict(
         project_name = "QUICHE",
         project_desc = "QUICHE (QUIC, HTTP/2, Etc) is Google‘s implementation of QUIC and related protocols",
         project_url = "https://github.com/google/quiche",
-        version = "aaf48d2e5e2a5e8b056abdeedf20c0cd0c69043e",
-        sha256 = "58f4d24535e46ed5225b55e037f09d1aed954ea26a2ea1ca3fb39911ad28d7a2",
+        version = "3c9db14bb3f5d479845bff8316988d053c7250d8",
+        sha256 = "11a7bd03d52c6f78d842ddbee8e7eb106596c80ac9c54de01a7843f44da6ea15",
         urls = ["https://github.com/google/quiche/archive/{version}.tar.gz"],
         strip_prefix = "quiche-{version}",
         use_category = ["controlplane", "dataplane_core"],
-        release_date = "2024-11-04",
+        release_date = "2024-11-13",
         cpe = "N/A",
         license = "BSD-3-Clause",
         license_url = "https://github.com/google/quiche/blob/{version}/LICENSE",