Make EnvId in all models optional

[nakabonne]

What this PR does / why we need it:
This PR makes all EnvID(s) optional since we're going to migrate Environment to Labels.
I looked up places where use EnvId and confirmed all seem to be able to work well without EnvId.

Which issue(s) this PR fixes:

Close #2805

Does this PR introduce a user-facing change?:

NONE

[pipecd-bot]

The following ISSUES will be created once got merged. If you want me to skip creating the issue, you can use /todo skip command.

Details

---

1. Make all environment fields in the form in optional

https://github.com/pipe-cd/pipe/blob/8c927e24eefda08d3584216dbf173c6f4cc7d52d/pkg/app/web/src/components/application-form/index.tsx#L133-L136

This was created by todo plugin since "TODO:" was found in 8c927e2 when #2812 was merged. cc: @nakabonne.

[khanhtc1202]

/lgtm

[pipecd-bot]

Code coverage for golang is 31.98%. This pull request decreases coverage by -0.18%.

File	Function	Base	Head	Diff
pkg/app/api/grpcapi/piped_api.go	PipedAPI.GetDeployment	--	0.00%	+0.00%
pkg/app/piped/planpreview/builder.go	loadDeploymentConfiguration	--	0.00%	+0.00%
pkg/app/piped/trigger/deployment.go	reportMostRecentlyTriggeredDeployment	--	0.00%	+0.00%
pkg/app/piped/trigger/determiner.go	determiners.Determiner	--	0.00%	+0.00%
pkg/app/piped/trigger/determiner.go	NewOnCommandDeterminer	--	0.00%	+0.00%
pkg/app/piped/trigger/determiner.go	OnCommandDeterminer.ShouldTrigger	--	0.00%	+0.00%
pkg/app/piped/trigger/determiner.go	NewOnOutOfSyncDeterminer	--	0.00%	+0.00%
pkg/app/piped/trigger/determiner.go	OnOutOfSyncDeterminer.ShouldTrigger	--	0.00%	+0.00%
pkg/app/piped/trigger/determiner.go	NewOnCommitDeterminer	--	0.00%	+0.00%
pkg/app/piped/trigger/determiner.go	OnCommitDeterminer.ShouldTrigger	--	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	Trigger.checkCandidates	--	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	Trigger.checkRepoCandidates	--	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	Trigger.listCommandCandidates	--	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	Trigger.listOutOfSyncCandidates	--	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	Trigger.listCommitCandidates	--	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	Trigger.notifyDeploymentTriggered	--	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	Trigger.notifyDeploymentTriggerFailed	--	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	loadDeploymentConfiguration	--	0.00%	+0.00%
pkg/config/deployment.go	PostSync.Validate	--	66.67%	+66.67%
pkg/config/deployment.go	DeploymentChain.Validate	--	66.67%	+66.67%
pkg/config/deployment.go	DeploymentChainNode.Validate	--	75.00%	+75.00%
pkg/config/deployment.go	DeploymentChainTriggerCondition.Validate	--	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	Trigger.updateRepoToLatest	0.00%	0.00%	+0.00%
pkg/config/deployment.go	GenericDeploymentSpec.Validate	46.15%	56.25%	+10.10%
pkg/config/piped.go	SecretManagement.UnmarshalJSON	62.50%	56.25%	-6.25%
pkg/app/piped/planpreview/builder.go	builder.findTriggerApps	0.00%	0.00%	+0.00%
pkg/app/piped/deploysource/deploysource.go	provider.prepare	0.00%	0.00%	+0.00%
pkg/app/piped/notifier/slack.go	slack.buildSlackMessage	0.00%	0.00%	+0.00%
pkg/app/piped/planner/ecs/ecs.go	Planner.Plan	0.00%	0.00%	+0.00%
pkg/app/piped/planner/kubernetes/kubernetes.go	Planner.Plan	0.00%	0.00%	+0.00%
pkg/app/piped/trigger/deployment.go	Trigger.triggerDeployment	0.00%	0.00%	+0.00%
pkg/app/piped/trigger/trigger.go	Trigger.Run	0.00%	0.00%	+0.00%
pkg/config/piped.go	PipedSpec.Validate	58.33%	57.14%	-1.19%
pkg/app/piped/appconfigreporter/appconfigreporter.go	Reporter.readApplicationInfo	76.92%	80.00%	+3.08%
pkg/config/sealed_secret.go	SealedSecretSpec.Validate	85.71%	71.43%	-14.29%
pkg/app/piped/sourcedecrypter/decrypter.go	DecryptSealedSecrets	77.27%	--	-77.27%
pkg/app/piped/trigger/deployment.go	Trigger.reportMostRecentlyTriggeredDeployment	0.00%	--	+-0.00%
pkg/app/piped/trigger/deployment.go	Trigger.getNotification	0.00%	--	+-0.00%
pkg/app/piped/trigger/determiner.go	NewDeterminer	0.00%	--	+-0.00%
pkg/app/piped/trigger/determiner.go	Determiner.ShouldTrigger	0.00%	--	+-0.00%
pkg/app/piped/trigger/determiner.go	Determiner.shouldTriggerOnCommit	0.00%	--	+-0.00%
pkg/app/piped/trigger/determiner.go	loadDeploymentConfiguration	0.00%	--	+-0.00%
pkg/app/piped/trigger/trigger.go	Trigger.checkNewCommands	0.00%	--	+-0.00%
pkg/app/piped/trigger/trigger.go	Trigger.checkNewCommits	0.00%	--	+-0.00%
pkg/app/piped/trigger/trigger.go	Trigger.syncApplication	0.00%	--	+-0.00%
pkg/app/piped/trigger/trigger.go	Trigger.listApplications	0.00%	--	+-0.00%
pkg/config/piped.go	PipedSpec.GetSecretManagement	0.00%	--	+-0.00%

[ono-max]

There you go.

/approve

[pipecd-bot]

This pull request is APPROVED by ono-max.

Approvers can cancel the approval by writing /approve cancel in a comment. Any additional commits also will change this pull request to be not-approved.

[pipecd-bot]

Code coverage for javascript is 84.24%. This pull request does not change code coverage.