fix(module:modal): remove dark backdrop when nzMask is false

[withOutUndo]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Application (the showcase website) / infrastructure changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

In Angular CDK Overlay, if backdropClass is not set, the default is 'cdk-overlay-dark-backdrop', which causes a black background even when nzMask is set to false. Therefore, set the default value based on the value of nzMask.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.92%. Comparing base (4f536ce) to head (b5ab04a).
Report is 25 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8798      +/-   ##
==========================================
- Coverage   93.24%   91.92%   -1.32%     
==========================================
  Files         537      537              
  Lines       18456    18455       -1     
  Branches     2816     2816              
==========================================
- Hits        17209    16965     -244     
+ Misses       1209     1184      -25     
- Partials       38      306     +268     

Flag	Coverage Δ
	?

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[HyperLife1119]

Suggested change

	hasBackdrop: true,
	scrollStrategy: this.overlay.scrollStrategies.block(),
	backdropClass: getValueWithConfig(config.nzMask, globalConfig.nzMask, true) ? MODAL_MASK_CLASS_NAME : '',
	hasBackdrop: getValueWithConfig(config.nzMask, globalConfig.nzMask, true),
	scrollStrategy: this.overlay.scrollStrategies.block(),

[withOutUndo]

Sure, I've resubmitted the code, please take a look.

[HyperLife1119]

There is a test that failed, can you take a look?

[withOutUndo]

In the test cases, there is a dynamic modification of the global configuration nzMask, but the CDK overlay does not have an API to dynamically add or remove the backdrop, so it cannot satisfy all test cases. Therefore, it was modified to

{
  hasBackdrop: true,
  backdropClass: getValueWithConfig(config.nzMask, globalConfig.nzMask, true) ? MODAL_MASK_CLASS_NAME : ''
}

[HyperLife1119]

LGTM