[Build/CI] Upgrade xgrammar to >=0.1.15

This update includes support for aarch64 among other fixes and improvements.

Closes #11886
Closes #13986

Implements part of #13894

Signed-off-by: Russell Bryant <rbryant@redhat.com>

Author: russellb

requirements/common.txt

@@ -19,7 +19,7 @@ tiktoken >= 0.6.0  # Required for DBRX tokenizer
 lm-format-enforcer >= 0.10.11, < 0.11
 outlines == 0.1.11
 lark == 1.2.2
-xgrammar == 0.1.11; platform_machine == "x86_64"
+xgrammar >= 0.1.15; platform_machine == "x86_64" or platform_machine == "aarch64"
 typing_extensions >= 4.10
 filelock >= 3.16.1 # need to contain https://github.com/tox-dev/filelock/pull/317
 partial-json-parser # used for parsing partial JSON outputs
@@ -37,4 +37,4 @@ depyf==0.18.0 # required for profiling and debugging with compilation config
 cloudpickle # allows pickling lambda functions in model_executor/models/registry.py
 watchfiles # required for http server to monitor the updates of TLS files
 python-json-logger # Used by logging as per examples/other/logging_configuration.md
-scipy # Required for phi-4-multimodal-instruct
+scipy # Required for phi-4-multimodal-instruct