feat: add secret management commands

[xianml]

What does this PR address?

add secret management commands

1. List
(.venv) ➜  ✗ bentoml  secret list                               
 Secret                                        Created_At                                                      Mount_As                          Keys                                                      Path                                                    
 secret-env                                    2024-05-29 09:16:12                                             env                               IS_TEST, HF_TOKEN                                         -                                                       
 secret-file7                                  2024-05-29 09:15:55                                             env                               IS_TEST                                                   -                                                       
 secret-bcvsz7                                 2024-05-29 08:42:29                                             file                              cacdac                                                    $BENTOML_HOME/aws 
2. Create 
(.venv) ➜  bentoml secret create -n secret-file8 -t file --from-file=.apikey=~/Downloads/github-recovery-codes.txt
Secret secret-file8 created successfully

3. Delete
(.venv) ➜ bentoml secret delete secret-file9                                                                     
Secret secret-file9 deleted successfully

4. Update
(.venv) ➜  bentoml secret apply s-file2 -t file --from-file key1=./auth.lua key2=xxx  -d "mount file test"
Secret s-file2 created successfully

5. Deploy with secrets

bentoml deploy -f - <<EOF
name: jtest-with-secret
bento: jtest:myuy6va6lkcbqiru
services:
  apiserver:
    scaling:
      min_replicas: 1
      max_replicas: 1
    instance_type: cpu.1
  iris_clf:
    scaling:
      min_replicas: 1
      max_replicas: 1
    instance_type: cpu.1
access_authorization: false
secrets:
  - secret-test
EOF
 

Fixes #(issue)

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[github-actions]

Package	Statements
bentoml	64.15% (11083 / 17275)
Summary	64.15% (11083 / 17275)

[frostming]

Should we merge this to 1.3 branch dev/1.3 instead of main?

[xianml]

Should we merge this to 1.3 branch dev/1.3 instead of main?

Agreed.