Improve code to enhance usage of C++17 features

Factorize CMake find_package scripts in Linphone SDK instead of duplicating them in each subprojects.

Build turbojpeg as subdirectory instead of external project (except for Windows where this causes some compilation issues).

cmake fix: Using absolute path is not allowed on install. By default, install() use CMAKE_INSTALL_PREFIX, so it is useless to add. By having added it, install() change its status for absolute which is not usable (for CPack).

Bugs:  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105616 and https://gcc.gnu.org/bugzilla/show_bug.cgi?id=10866

LDAP: - Add missing bracket on filter if needed. - Add tests on getting contacts where max items are set from magic search and ldap search. Use of base object to select bigger database. - Search all contacts till the max of the magic search limit.

Add a test on cancelling a request and restart it by keeping the old downloaded file.Fix a leak on repeating file downloading request. Add a test on cancelling a download request and restart it by keeping the file that was cancelled.
Ignore local file size on downloading.

- Replace '==' expression (that doesn't exist into WHERE queries in SQL) by '='.
- Put 'LEFT JOIN' statement right after 'chat_room' table in order to be allowed to be used in on clause.

Fix Robot voice by upgrading resampling to manage channel convertion. It was not working with channels > 2
Fix MSWasapi to be used with multichannels.

When requesting participant devices, append devices to the device list in order to keep the same order as participants.

    participants devices when recreating a chat room with the information
    that we find in the database

+ recv bandwidth estimator uses only OrtpBwEstimator

Build bcg729, bcunit and bzrtp statically for iOS.