Move offer from stack to heap (#2070)

* Ensure remote description does not live in memory for viewer duration (#1915)

* Ensure remote description does not live in memory for viewer duration

* Fix memory leak

* Free the allocated memory upon failure, also add missing enter, leave and chk_log_error in peerconnection

* Working reduced stack sizes. Adjusted default stack size to 64kb, moved Offer/Answer messages to be on heap instead of stack

* Revert setting the stack sizes by default; Samples: revert disableSenderSideBandwidthEstimation to TRUE by default

* Add missing malloc out of memory checks

* Undo samples/Common.c changes

* Add chk_log_err to freeJitterBuffer and freeKvsRtpTransceiver

* Address comments: add additional null checks and adjust comments

* Clang-format

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Co-authored-by: Divya Sampath Kumar <[email protected]>
Co-authored-by: James Delaplane <[email protected]>