Fixes for esp32 flashing_script

[cecille]

Problem

Flash script for ESP32 throws an exception. Also, cmake code is duplicated in multiple projects.

Change overview

• brings back default for bootloader offset (this is what's causing the crash in most cases)
• puts cmake code into a macro in a common file rather than in each file.
• adds a flashing flag to the build-all-clusters-app.sh script that checks for the required environment variables and warns on unset variables (will also cause a crash)

Testing

• build (idf.py build) and created flashing script (idf.py flashing_script) in all clusters, pigweed and persistent storage

[github-actions]

Size increase report for "esp32-example-build" from 110ef41

File	Section	File	VM
chip-shell.elf	.flash.text	32	32
chip-all-clusters-app.elf	.flash.text	16	16
chip-lock-app.elf	.flash.text	64	64

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-persistent-storage.elf and ./pull_artifact/chip-persistent-storage.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-pigweed-app.elf and ./pull_artifact/chip-pigweed-app.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-shell.elf and ./pull_artifact/chip-shell.elf:

sections,vmsize,filesize
.flash.text,32,32
[Unmapped],0,-32

Comparing ./master_artifact/chip-all-clusters-app.elf and ./pull_artifact/chip-all-clusters-app.elf:

sections,vmsize,filesize
.xt.lit._ZN4chip6System5Mutex6UnlockEv,0,128
.xt.lit._ZN4chip11DeviceLayer8Internal35GenericPlatformManagerImpl_FreeRTOSINS0_19PlatformManagerImplEE10_PostEventEPKNS0_15ChipDeviceEventE,0,80
.xt.prop._ZN4chip11DeviceLayer8Internal26GenericPlatformManagerImplINS0_19PlatformManagerImplEE14_InitChipStackEv,0,40
.flash.text,16,16
.xt.prop._ZN4chip11DeviceLayer8Internal35GenericPlatformManagerImpl_FreeRTOSINS0_19PlatformManagerImplEE14_LockChipStackEv,0,-12
.xt.prop._ZN4chip11DeviceLayer8Internal35GenericPlatformManagerImpl_FreeRTOSINS0_19PlatformManagerImplEE15_StartChipTimerEj,0,-12
.xt.prop._ZN4chip11DeviceLayer8Internal35GenericPlatformManagerImpl_FreeRTOSINS0_19PlatformManagerImplEE16_UnlockChipStackEv,0,-12
[Unmapped],0,-16
.xt.lit._ZN4chip11DeviceLayer8Internal35GenericPlatformManagerImpl_FreeRTOSINS0_19PlatformManagerImplEE14_LockChipStackEv,0,-48
.xt.lit._ZN4chip11DeviceLayer8Internal35GenericPlatformManagerImpl_FreeRTOSINS0_19PlatformManagerImplEE15_StartChipTimerEj,0,-48
.xt.lit._ZN4chip11DeviceLayer8Internal35GenericPlatformManagerImpl_FreeRTOSINS0_19PlatformManagerImplEE16_UnlockChipStackEv,0,-48
.xt.prop._ZN4chip6System5Mutex6UnlockEv,0,-108

Comparing ./master_artifact/chip-temperature-measurement-app.elf and ./pull_artifact/chip-temperature-measurement-app.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-lock-app.elf and ./pull_artifact/chip-lock-app.elf:

sections,vmsize,filesize
.flash.text,64,64
[Unmapped],0,-64

[sweetymhaiske]

@cecille Can you please update the README (Remove setting of baud value explicitly)?
README of all-clusters-app, persistent-storage , lock-app and temperature-measurement-app

[mspang]

@woody-apple @bzbarsky-apple @saurabhst @jmartinez-silabs