Set git revision at build from env variable

[feedmeapples]

What changed?

Allows to set git revision at build from env variable

Why?

Github actions only fetch one commit of data for submodules and not git history, hence the build was throwing "not a git repository"
https://github.com/temporalio/docker-builds/runs/4975313307?check_suite_focus=true#step:7:321

There is an option to fetch git history but seems only for the root project and not the submodules, using fetch_depth param, see https://github.com/actions/checkout#checkout-v2

How did you test it?

$ bash develop/scripts/create_build_info_data.sh

$ cat ./build/info/data.json 
{"gitRevision":"864150a00","buildTimeUnix":1643337842}

$ export GITHUB_SHA_SHORT=333

$ bash develop/scripts/create_build_info_data.sh

$ cat ./build/info/data.json 

{"gitRevision":"333","buildTimeUnix":1643337908}

Potential risks

Is hotfix candidate?