Use dockerignore rules that play better with recent docker versions #15872

Job	Run time
Lint	1m 2s
Updater	3m 53s
ci (bundler, bundler1, 2, 0, bundler)	5m 14s
ci (bundler, bundler1, 2, 1, bundler)	4m 1s
ci (bundler, bundler2, 2, 0, bundler)	4m 30s
ci (bundler, bundler2, 2, 1, bundler)	4m 33s
ci (cargo, cargo, cargo)	2m 11s
ci (common, common, common)	2m 34s
ci (composer, composer, 2, 0, composer)	2m 21s
ci (composer, composer, 2, 1, composer)	3m 25s
ci (docker, docker, docker)	1m 53s
ci (elm, elm, elm)	1m 49s
ci (git_submodules, git_submodules, gitsubmodule)	1m 24s
ci (github_actions, github_actions, github-actions)	1m 23s
ci (go_modules, go_module, 2, 0, gomod)	2m 48s
ci (go_modules, go_module, 2, 1, gomod)	5m 29s
ci (gradle, gradle, gradle)	1m 20s
ci (hex, hex, 2, 0, mix)	4m 10s
ci (hex, hex, 2, 1, mix)	5m 14s
ci (maven, maven, maven)	1m 20s
ci (npm_and_yarn, npm_and_yarn, 3, 0, npm)	3m 30s
ci (npm_and_yarn, npm_and_yarn, 3, 1, npm)	8m 14s
ci (npm_and_yarn, npm_and_yarn, 3, 2, npm)	4m 5s
ci (nuget, nuget, nuget)	1m 44s
ci (pub, pub, 2, 0, pub)	5m 51s
ci (pub, pub, 2, 1, pub)	6m 36s
ci (python, python, 2, 0, pip)	12m 43s
ci (python, python, 2, 1, pip)	6m 5s
ci (python, python_slow, 2, 0, pip)	4m 45s
ci (python, python_slow, 2, 1, pip)	7m 36s
ci (swift, swift, 2, 0, swift)	6m 25s
ci (swift, swift, 2, 1, swift)	2m 3s
ci (terraform, terraform, terraform)	4m 41s
	2h 14m 52s

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