Test docker-image golang 1.16

Upgrade golang from 1.14 to 1.16

Signed-off-by: llhuii <liulinghui@huawei.com>

test on main branch

debug

Signed-off-by: llhuii <liulinghui@huawei.com>

add cgo_alpine for LC speed

buildx: add build speed for LC

Add a tag '_speed_buildx_for_cgo_alpine' for Dockerfiles:
1. require golang with CGO_ENABLED=1
2. use alpine image.

So used in 'build/lc/Dockerfile'

Signed-off-by: llhuii <liulinghui@huawei.com>

v0.5.2 after cross build speed

buildx: speed the language having builtin build

We use docker-buildx to build our components images for different
platforms.

But for some languages, such as golang, have good builtin build for
multi platforms, and buildx support that.
In Sedna, we have GM/LC written by golang. This commit supports this
function.

Signed-off-by: llhuii <liulinghui@huawei.com>

v0.5.1 after cross build speed

Add buildx speed in case the language good support

Signed-off-by: llhuii <liulinghui@huawei.com>

v0.5.0 before cross build speed

revert buildx

Signed-off-by: llhuii <liulinghui@huawei.com>

v0.5.4 test

Full Changelog: v0.3.3...v0.5.4

test push image action

Fix IMAGE_REPO in github image-publish action

Using the env 'GITHUB_REPOSITORY' instead of 'GITHUB_ACTOR' to get the right
image repo name i.e. `IMAGE_REPO` in Makefile.

Signed-off-by: llhuii <liulinghui@huawei.com>