[ioctl] Build block bucket command line into new ioctl

[LuckyPigeon]

Description

Build bcbucket command in new ioctl, with the following note.

• Use client interface to construct the Cobra command.
• Output package is deprecated, replace it with errors package.
• Replace fmt.Println with cmd.Println
• Global variables (config.ReadConfig config.DefaultConfigFile etc.) have been wrapped into client interface. Please use client interface to access them if needed
• Refactor unit test to cover the modification.
• Check results in each unit test.

Fixes #3265

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code refactor or improvement

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [] TestNewBCBucketCmd

Test Configuration:

• Firmware version: Ubuntu 21.04
• Hardware:
• Toolchain:
• SDK:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

Merging #3386 (5ff4c65) into master (61d189f) will increase coverage by 0.07%.
The diff coverage is 89.47%.

@@            Coverage Diff             @@
##           master    #3386      +/-   ##
==========================================
+ Coverage   75.22%   75.29%   +0.07%     
==========================================
  Files         238      239       +1     
  Lines       22057    22171     +114     
==========================================
+ Hits        16592    16694     +102     
- Misses       4574     4581       +7     
- Partials      891      896       +5     

Impacted Files	Coverage Δ
ioctl/newcmd/bc/bcbucket.go	89.47% <89.47%> (ø)

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[LuckyPigeon]

@huof6829
How can I test bcbucket.go if I don't have relative node for tcp dial connection. Code show as follow,

iotex-core/ioctl/cmd/bc/bcbucket.go

Line 162 in de09d24

conn, err := util.ConnectToEndpoint(config.ReadConfig.SecureConnect && !config.Insecure)

[huof6829]

@huof6829 How can I test bcbucket.go if I don't have relative node for tcp dial connection. Code show as follow,

iotex-core/ioctl/cmd/bc/bcbucket.go

Line 162 in de09d24

conn, err := util.ConnectToEndpoint(config.ReadConfig.SecureConnect && !config.Insecure)

use client.APIServiceClient, then use gomock function in test function. See

iotex-core/ioctl/newcmd/account/account.go

Line 190 in de09d24

apiServiceClient, err := client.APIServiceClient(ioctl.APIServiceConfig{

[LuckyPigeon]

@xianhuawei
This PR hasn't completed yet, still working on unit test.

[Liuhaai]

@LuckyPigeon the test fails. Could you help fix it? The pr is ready to be merged.

[LuckyPigeon]

@Liuhaai Done!