Integrate LLVM at llvm/llvm-project@2c3ca3b684bb

Updates LLVM usage to match
[2c3ca3b684bb](llvm/llvm-project@2c3ca3b684bb)

PiperOrigin-RevId: 467337170

Author: TFRT team

third_party/llvm/workspace.bzl

@@ -4,8 +4,8 @@ load("//third_party:repo.bzl", "tfrt_http_archive")
 
 def repo(name):
     """Imports LLVM."""
-    LLVM_COMMIT = "e8e718fa4b850d93a94ff47d55869401f0285d98"
-    LLVM_SHA256 = "6f54a9ede93542b1c64895a19a8e79094d2a9781563fe8d68c7d234181a00c47"
+    LLVM_COMMIT = "2c3ca3b684bb2b188d977d47548e79dc559fb8ad"
+    LLVM_SHA256 = "fd0d1909fac0b6fdeb6a600c7fba447993695bf87eb0d3763196571dbdd11003"
 
     tfrt_http_archive(
         name = name,