Update QUICHE from 190b5ae8e to 3a1960c51 (#43954)

Update QUICHE from 190b5ae8e to 3a1960c51
https://github.com/google/quiche/compare/190b5ae8e..3a1960c51

```
$ git log 190b5ae8e..3a1960c51 --date=short --no-merges --format="%ad %al %s"

2026-03-13 quiche-dev Deprecate --gfe2_reloadable_flag_reset_content_length_status_when_removing_content_length_header.
2026-03-11 haoyuewang No public description
2026-03-11 dmcardle Add field to BoostIcwHeader proto message: h3_force_enable_quic_bbr_exit_startup_on_loss
2026-03-11 asedeno Fix OSS QUICHE build.
2026-03-11 dmcardle Add field to NetworkParams for updating BBRv1's exit-startup-on-loss behavior
2026-03-11 martinduke Fix fuzz test error.
2026-03-11 vasilvv Refactor how MOQT control messages are parsed, part 1.
2026-03-10 vasilvv Implement MOQ/EBML varint parsing and serialization.
```

Additional changes:
-Adding moq_varint build dependency

Risk Level: Low
Testing: Existing tests pass
Docs Changes: N/A
Release Notes: N/A
Platform Specific Features: N/A

---------

Signed-off-by: Rickyp <ricardo.perezper@gmail.com>

Author: Rickyp

bazel/deps.yaml

@@ -284,7 +284,7 @@ quiche:
   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"
-  release_date: "2026-03-10"
+  release_date: "2026-03-13"
   use_category:
   - controlplane
   - dataplane_core

bazel/external/quiche.BUILD

@@ -5080,10 +5080,12 @@ envoy_cc_library(
 envoy_cc_library(
     name = "quiche_common_lib",
     srcs = [
+        "quiche/common/moq_varint.cc",
         "quiche/common/quiche_data_reader.cc",
         "quiche/common/quiche_data_writer.cc",
     ],
     hdrs = [
+        "quiche/common/moq_varint.h",
         "quiche/common/quiche_data_reader.h",
         "quiche/common/quiche_data_writer.h",
         "quiche/common/quiche_linked_hash_map.h",
@@ -5093,6 +5095,8 @@ envoy_cc_library(
     deps = [
         ":quiche_common_endian_lib",
         ":quiche_common_platform",
+        "@abseil-cpp//absl/base",
+        "@abseil-cpp//absl/numeric:bits",
     ],
 )
 

bazel/repository_locations.bzl

@@ -542,8 +542,8 @@ REPOSITORY_LOCATIONS_SPEC = dict(
         urls = ["https://github.com/simdutf/simdutf/releases/download/v{version}/singleheader.zip"],
     ),
     quiche = dict(
-        version = "190b5ae8e8d3dcdda0fa77f7e34f244bf65c9285",
-        sha256 = "9907779d5421d8ebff9ae8033790bca41bf25b9e92b898abec7cfc765edf944f",
+        version = "3a1960c518a0201b1b34384bcc89ea81add484cf",
+        sha256 = "edc92981797fddf5ff355cba9b83e00b1e0ce180812c5ca0fd139a2120482e0c",
         urls = ["https://github.com/google/quiche/archive/{version}.tar.gz"],
         strip_prefix = "quiche-{version}",
     ),