Stop assuming CHIP_ERROR is an integer in Darwin code.

[bzbarsky-apple]

Some of the fixes have to do with the fact that %@ is not a format
ChipLogging supports, not strictly with the CHIP_ERROR changes.

Problem

Various Darwin-specific code assumes that a CHIP_ERROR is an int.

Change overview

Stop making those assumptions.

Testing

Compiled code, locally ran Darwin tests.

[github-actions]

Size increase report for "esp32-example-build" from f382df3

File	Section	File	VM
chip-temperature-measurement-app.elf	.flash.text	47	60
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-temperature-measurement-app.elf and ./pull_artifact/chip-temperature-measurement-app.elf:

sections,vmsize,filesize
[Unmapped],0,4049
.flash.text,60,47

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

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

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

sections,vmsize,filesize

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

sections,vmsize,filesize

Comparing ./master_artifact/chip-ipv6only-app.elf and ./pull_artifact/chip-ipv6only-app.elf:

sections,vmsize,filesize

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

sections,vmsize,filesize