Cleanup terraformer usage

[timebertt]

How to categorize this PR?

/area logging quality
/kind cleanup
/priority normal
/platform gcp

What this PR does / why we need it:

This PR adapts the infrastructure actuator to gardener/gardener#3223 by

• correctly propagating contexts in terraformer calls
• switching to logr for terraformer usage (instead of logrus) which makes it consistent with the other controller logs (which already use logr). Now all the logging in the infrastructure controller/actuator is done via logr instead of a mix between logr and logrus.

Also, it improves logging in the infrastructure actuator and test by making extensive use of the structured logging mechanisms (setting additional variables at the top level functions, which will be propagated to all logs - even to the terraformer logs), so they will be more helpful for debugging future issues.

For example:

Before:

2020-11-25T13:42:35.227+0100	INFO	infrastructure_controller	Deleting the infrastructure	{"infrastructure": "infrastructure"}
2020-11-25T13:42:35.227+0100	DEBUG	controller-runtime.manager.events	Normal	{"object": {"kind":"Infrastructure","namespace":"gcp-infrastructure-it--n93ux","name":"infrastructure","uid":"e6dd22b6-d36c-490d-8d62-a5f37f7ecd4f","apiVersion":"extensions.gardener.cloud/v1alpha1","resourceVersion":"24386"}, "reason": "InfrastructureDeletion", "message": "Deleting the infrastructure"}
time="2020-11-25T13:42:39+01:00" level=info msg="Deploying Terraformer Pod with .meta.generateName 'infrastructure.infra.tf-destroy-'."
time="2020-11-25T13:42:39+01:00" level=info msg="Successfully created Terraformer Pod 'infrastructure.infra.tf-destroy-dkqrc'."
time="2020-11-25T13:42:39+01:00" level=info msg="Waiting for Terraform Pod 'infrastructure.infra.tf-destroy-dkqrc' to be completed..."

Now:

2020-11-25T11:48:18.075+0100	INFO	infrastructure_controller	Deleting the infrastructure	{"infrastructure": "gcp-infrastructure-it--9xl55/infrastructure", "operation": "delete"}
2020-11-25T11:48:18.075+0100	DEBUG	controller-runtime.manager.events	Normal	{"object": {"kind":"Infrastructure","namespace":"gcp-infrastructure-it--9xl55","name":"infrastructure","uid":"8226ee87-dd61-4009-a27b-83bcd61d20a3","apiVersion":"extensions.gardener.cloud/v1alpha1","resourceVersion":"10943"}, "reason": "InfrastructureDeletion", "message": "Deleting the infrastructure"}
2020-11-25T11:48:18.394+0100	INFO	infrastructure-actuator.terraformer	Ensuring all terraformer Pods have been deleted	{"infrastructure": "gcp-infrastructure-it--9xl55/infrastructure", "operation": "delete"}
2020-11-25T11:48:18.399+0100	INFO	infrastructure-actuator.terraformer	Waiting for clean environment	{"infrastructure": "gcp-infrastructure-it--9xl55/infrastructure", "operation": "delete"}

Special notes for your reviewer:
✅ depends on gardener/gardener#3223

Release note:

Logging in the infrastructure actuator has been improved to make it consistent in the logging format and more readable/helpful.

[rfranzke]

/test-single

[testmachinery]

🔥 Oops, something went wrong @rfranzke
unable to create Testrun

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The specified path is rendered as testrun and the current repository is injected as a default location.


Example: /test-single [path to the testrun]

Usage:
      --dry-run   Print the rendered testrun

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[rfranzke]

/assign @schrodit
👀

[schrodit]

🔥 Oops, something went wrong @rfranzke
unable to create Testrun

Instructions for interacting with me using PR comments are available here

we are running again into rate limits: 403 API rate limit exceeded for user ID 499 85316

fyi @dguendisch

[timebertt]

Vendored the current g/g master, so as such this PR is
/ready
But we can also choose not to vendor a master and update the PR once g/g is released. Opinions?

/test-single

[testmachinery]

Testrun: e2e-lkr6r
Workflow: e2e-lkr6r-wf
Phase: Succeeded

+---------------------+---------------------+-----------+----------+
|        NAME         |        STEP         |   PHASE   | DURATION |
+---------------------+---------------------+-----------+----------+
| infrastructure-test | infrastructure-test | Succeeded | 7m55s    |
+---------------------+---------------------+-----------+----------+

[rfranzke]

/lgtm

[prashanth26]

/lgtm