WIP: Add Bazel build files

[munnerz]

What this PR does / why we need it:

This is an experiment to add support for building Navigator with Bazel. It should eventually replace make, and will help reduce the number of dependencies we need to bake into our test-infra images.

This PR also allows building docker images without Docker itself. It can currently also be used to build and unit test (i.e. gotest) all components of Navigator.

Special notes for your reviewer:

This is WIP, and work needs to be done to make this work in our CI environment as well as triggering e2e tests (and other scripts in the hack/ directory)

Release note:

NONE

[jetstack-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

Bazel verify job is passing :tada:

Now just to move more things into this job!

[munnerz]

/test bazel-e2e v1.9

[munnerz]

/test bazel-e2e v1.9

[munnerz]

/test bazel-e2e v1.9

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test bazel-e2e v1.9

[munnerz]

/test bazel-e2e v1.9

[munnerz]

/test bazel-e2e v1.9

[munnerz]

/test bazel-e2e v1.9

[munnerz]

/test bazel-e2e v1.9

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[munnerz]

/test pull-navigator-bazel-verify

[jetstack-bot]

@munnerz: The following tests failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
navigator-quick-verify	4fff340c75bb11e33d659492a6630d1e4e706d54	link	/test verify
navigator-e2e-v1-8	4fff340c75bb11e33d659492a6630d1e4e706d54	link	/test e2e v1.8
pull-navigator-bazel-verify	4fff340c75bb11e33d659492a6630d1e4e706d54	link	/test pull-navigator-bazel-verify
navigator-e2e-v1-9	4fff340c75bb11e33d659492a6630d1e4e706d54	link	/test e2e v1.9
navigator-e2e-v1-7	4fff340c75bb11e33d659492a6630d1e4e706d54	link	/test e2e v1.7

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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