Rename pipedv1 subcommand from piped to run

[khanhtc1202]

What this PR does:

ssia

Why we need it:

The PR changes the piped execution command as bellow

old

Usage:
  piped [command]

Available Commands:
  completion  Generate the autocompletion script for the specified shell
  help        Help about any command
  piped       Start running piped.
  version     Print the information of current binary.

new

Usage:
  piped [command]

Available Commands:
  completion  Generate the autocompletion script for the specified shell
  help        Help about any command
  run         Start running piped.    <-- this was changed
  version     Print the information of current binary.

This means the piped running command changes from piped piped --flags to piped run --flags.

Tested the helm chart using my locally built chart usingthe following commands

$ make build/chart MOD=pipedv1-exp VERSION=v1.0.0-rc4
$ helm template pipedv1-exp .artifacts/pipedv1-exp-v1.0.0-rc4.tgz --version=v1.0.0-rc4 --namespace=pipecd --create-namespace --set-file config.data=.dev/in-cluster-pipedv1-config.yaml > .dev/piped-template-OUT.yaml
$ less .dev/piped-template-OUT.yaml
...
    spec:
      serviceAccountName: pipedv1-exp
      containers:
        - name: piped
          imagePullPolicy: IfNotPresent
          image: "ghcr.io/pipe-cd/pipedv1-exp:v1.0.0-rc4"
          args:
            - run
            - --config-file=/etc/piped-config/piped-config.yaml
            - --metrics=true
            - --log-encoding=humanize
            - --log-level=info
            - --add-login-user-to-passwd=false
            - --insecure=false
...

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

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 28.70%. Comparing base (03df4a5) to head (f880195).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/app/pipedv1/cmd/piped/piped.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6227   +/-   ##
=======================================
  Coverage   28.69%   28.70%           
=======================================
  Files         560      560           
  Lines       59728    59728           
=======================================
+ Hits        17140    17144    +4     
+ Misses      41271    41268    -3     
+ Partials     1317     1316    -1     

Flag	Coverage Δ
.	23.23% <0.00%> (ø)
.-pkg-app-pipedv1-plugin-analysis	32.64% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes	57.90% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	67.48% <ø> (ø)
.-pkg-app-pipedv1-plugin-scriptrun	54.83% <ø> (ø)
.-pkg-app-pipedv1-plugin-terraform	39.49% <ø> (ø)
.-pkg-app-pipedv1-plugin-wait	35.51% <ø> (ø)
.-pkg-app-pipedv1-plugin-waitapproval	55.73% <ø> (ø)
.-pkg-plugin-sdk	50.47% <ø> (+0.19%)	⬆️
.-tool-actions-gh-release	19.23% <ø> (ø)
.-tool-actions-plan-preview	25.51% <ø> (ø)
.-tool-codegen-protoc-gen-auth	0.00% <ø> (ø)

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[t-kikuc]

Let's describe in the migration guide and v1 docs

[ffjlabo]

👍