main/libgit2: use python3 and system http-parser

7 jobs for !702 with libgit2 in 13 minutes and 20 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Lint
passed lint #7395
docker-alpine x86_64

00:00:22

 
  Build
passed build-aarch64 #7400
docker-alpine ci-build aarch64

00:01:22

passed build-armv7 #7401
docker-alpine ci-build armv7

00:01:23

passed build-ppc64le #7399
docker-alpine ci-build ppc64le

00:01:16

passed build-s390x #7398
ci-build s390x docker-alpine

00:01:17

passed build-x86 #7397
docker-alpine ci-build x86

00:11:39

passed build-x86_64 #7396
docker-alpine ci-build x86_64

00:01:09