v1.2_TE1

Instructions

• Pair this with Matter SDK SHA: 1aca004d68640ae7df27adea09315308cf1913cd for TE#1 testing

What's Changed

• Re-apply [build] update zap-template file (#115) by @step0035 in #121
• [portinglayer] fix tasks hogging the cpu by @step0035 in #127
• [lwip] increase bufsize to 1500 by @step0035 in #117
• [portinglayer] add a str field in the union for string data by @step0035 in #130

Full Changelog: v1.1.0.1...v1.2_TE1