Import mbedtls-3.6.0

Imports Mbed TLS 3.6.0 from https://github.com/Mbed-TLS/mbedtls.git
tags mbedtls-3.6.0, v3.6.0

Files that are not needed are removed:

cd lib/libmbedtls
rm -rf mbedtls
cp -R path/to/mbedtls-3.6.0/mbedtls .
cd mbedtls
rm CMakeLists.txt DartConfiguration.tcl Makefile
rm .gitignore .travis.yml .pylintrc .globalrc .mypy.ini BRANCHES.md
rm include/.gitignore include/CMakeLists.txt library/.gitignore
rm library/CMakeLists.txt library/Makefile
rm -r cmake
rm -rf .git .github doxygen configs programs scripts tests visualc
rm -rf 3rdparty ChangeLog.d docs pkgconfig .gitmodules .readthedocs.yaml
rm library/mps_*
cd ..
git add mbedtls

This time we leave library/psa_* present to enable TLS 1.3 features.

This is a complete overwrite of previous code so earlier changes in the
previous branch import/mbedtls-3.4.0 will be added on top of this commit.

Signed-off-by: Tom Van Eyck <tom.vaneyck@kuleuven.be>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/lib/libmbedtls/mbedtls/library/md_psa.h b/lib/libmbedtls/mbedtls/library/md_psa.h
new file mode 100644
index 0000000..028ba24
--- /dev/null
+++ b/lib/libmbedtls/mbedtls/library/md_psa.h
@@ -0,0 +1,26 @@
+/**
+ * Translation between MD and PSA identifiers (algorithms, errors).
+ *
+ *  Note: this internal module will go away when everything becomes based on
+ *  PSA Crypto; it is a helper for the transition period.
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+#ifndef MBEDTLS_MD_PSA_H
+#define MBEDTLS_MD_PSA_H
+
+#include "common.h"
+
+#include "mbedtls/md.h"
+#include "psa/crypto.h"
+
+/** Convert PSA status to MD error code.
+ *
+ * \param status    PSA status.
+ *
+ * \return          The corresponding MD error code,
+ */
+int mbedtls_md_error_from_psa(psa_status_t status);
+
+#endif /* MBEDTLS_MD_PSA_H */