Add k8s e2e test

[ffjlabo]

What this PR does:

This is the draft test for k8s ensureSync.
Just for reference implementation.

Why we need it:

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 26.10%. Comparing base (f3ce846) to head (4b1f396).
Report is 34 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5399      +/-   ##
==========================================
+ Coverage   25.84%   26.10%   +0.25%     
==========================================
  Files         448      451       +3     
  Lines       48255    48824     +569     
==========================================
+ Hits        12473    12747     +274     
- Misses      34810    35059     +249     
- Partials      972     1018      +46     

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[ffjlabo]

After zap 1.14.1, we need to set EncodeTime if we set TimeKey. So the test for piped's logger is failed.
uber-go/zap#791

But currently, piped's logger doesn't show a timestamp when the log encoding is HumanizeEncoding.
So I fixed not to set TimeKey.

[khanhtc1202]

[question] How does this affect other log encoding settings (which are not humanized)? Afaik, some teams are using piped logs with JSON encoding now, so we need to ensure nothing is broken.

[ffjlabo]

@khanhtc1202
I think it doesn't affect other log formats because EncodeTime is set for the other format.
https://github.com/pipe-cd/pipecd/blob/9ddcc8e9f80d441a05b6873a3719df5c79cca002/pkg/log/log.go#L92C1-L121C2

The problem is that when not set EncodeTime despite TimeKey is set.
uber-go/zap#791

I also checked the log for each formats below and eventTime is inserted when using json and console log format.

json format

% CONFIG_FILE=./.dev/local2/piped.yaml LOG_ENCODING=json make run/piped                                                                                                                      (git)-[add-k8s-e2e-test]
go run cmd/piped/main.go piped --tools-dir=/tmp/piped-bin --config-file=./.dev/local2/piped.yaml --insecure=false --log-encoding=json
{"severity":"INFO","eventTime":1734398586.566765,"logger":"piped.piped","caller":"piped/piped.go:182","message":"successfully configured ssh-config","serviceContext":{"service":"piped.piped","version":"unspecified"}}
{"severity":"INFO","eventTime":1734398586.568584,"logger":"piped.piped.tool-registry","caller":"toolregistry/registry.go:57","message":"successfully loaded the pre-installed tools","serviceContext":{"service":"piped.piped","version":"unspecified"},"tools":{"helm":{},"kubectl-1.18.5":{},"kubectl-1.30.0":{},"kubectl-1.30.5":{},"kustomize":{}}}
{"severity":"INFO","eventTime":1734398589.319672,"logger":"piped.piped.notifier","caller":"notifier/notifier.go:116","message":"all 0 notifiers have been started","serviceContext":{"service":"piped.piped","version":"unspecified"}}
...

console format

% CONFIG_FILE=./.dev/local2/piped.yaml LOG_ENCODING=console make run/piped                                                                                                                   (git)-[add-k8s-e2e-test]
go run cmd/piped/main.go piped --tools-dir=/tmp/piped-bin --config-file=./.dev/local2/piped.yaml --insecure=false --log-encoding=console
1.734398656024647e+09	INFO	piped.piped	piped/piped.go:182	successfully configured ssh-config	{"serviceContext": {"service": "piped.piped", "version": "unspecified"}}
1.734398656024822e+09	INFO	piped.piped.tool-registry	toolregistry/registry.go:57	successfully loaded the pre-installed tools	{"serviceContext": {"service": "piped.piped", "version": "unspecified"}, "tools": {"helm":{},"kubectl-1.18.5":{},"kubectl-1.30.0":{},"kubectl-1.30.5":{},"kustomize":{}}}
1.734398657369169e+09	INFO	piped.piped.notifier	notifier/notifier.go:116	all 0 notifiers have been started	{"serviceContext": {"service": "piped.piped", "version": "unspecified"}}
...

humanize format

% CONFIG_FILE=./.dev/local2/piped.yaml LOG_ENCODING=humanize make run/piped                                                                                                                  (git)-[add-k8s-e2e-test]
go run cmd/piped/main.go piped --tools-dir=/tmp/piped-bin --config-file=./.dev/local2/piped.yaml --insecure=false --log-encoding=humanize
successfully configured ssh-config
successfully loaded the pre-installed tools	{"tools": {"helm":{},"kubectl-1.18.5":{},"kubectl-1.30.0":{},"kubectl-1.30.5":{},"kustomize":{},"kustomize-5.0.1":{},"kustomize-5.3.0":{}}}
all 0 notifiers have been started

[ffjlabo]

I checked, and there are no notable changes for the release of this updated dependency below.

• github.com/NYTimes/gziphandler
• github.com/prometheus/client_golang
• github.com/prometheus/common
• github.com/spf13/cobra
• go.uber.org/zap
• sigs.k8s.io/yaml

Also, I fixed the cause of failing test for zap.
#5399 (comment)

[Warashi]

LGTM 👍🏻

[khanhtc1202]

Thank you 👍

[khanhtc1202]

Suggested change

	test/go: ENVTEST_BIN ?= ${PWD}/.dev/bin
	test/go: ENVTEST_BIN ?= ./.dev/bin

This should be fine

[ffjlabo]

@khanhtc1202
We need it as absolute path for setup-envtest. So I want to keep it as is.
I added the comment.

4b1f396

[khanhtc1202]

Got it and reapproved 👍

[khanhtc1202]

👍 Thank you

[Warashi]

👍🏻