testing/cargo-c: upgrade to 0.8.2

Ref https://github.com/lu-zero/cargo-c/releases/tag/v0.8.2
8 jobs for !22456 with cargo-c in 59 minutes and 31 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Lint
passed #419047
docker-alpine x86_64
lint

00:00:10

 
  Build
passed #419052
docker-alpine ci-build aarch64
build-aarch64

00:20:39

passed #419054
docker-alpine ci-build armhf
build-armhf

00:26:13

passed #419053
docker-alpine ci-build armv7
build-armv7

00:22:24

passed #419051
docker-alpine ci-build ppc64le
build-ppc64le

00:12:27

passed #419050
docker-alpine ci-build s390x
build-s390x

00:00:21

passed #419049
docker-alpine ci-build x86
build-x86

00:08:05

passed #419048
docker-alpine ci-build x86_64
build-x86_64

00:06:11