fix(eslint-plugin-template): [prefer-self-closing-tags] improve code style of fixer result

[json-derulo]

Currently when running the fixer of the prefer-self-closing-tags rule, in some scenarios a result is generated, which is considered as bad code style by common sense and formatters like prettier. More specifically, currently the fixer always adds an additional whitespace before the self closing tag. However when the end of the starting tag is indented or on a new line, this additional whitespace produces misalignment.

For example, take the following code:

<my-component
  someAttribute="someValue"
></my-component>

Currently the fixer would produce the following reusult:

<my-component
  someAttribute="someValue"
 />

With the changes of this PR it would become:

<my-component
  someAttribute="someValue"
/>

[nx-cloud]

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✅ Successfully ran 7 targets

• Node v18.17.1 - nx run-many --target=integration-test --all --withRegistry
• Node v18.17.1 - nx run-many -t test --codeCoverage
• Node v16.20.2 - nx run-many -t test
• Node v18.17.1 - nx run-many -t typecheck
• Node v18.17.1 - nx run-many -t build
• Node v18.17.1 - nx run-many -t check-rule-docs
• Node v16.20.2 - nx run-many -t build

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[codecov]

Codecov Report

Merging #1520 (fef5383) into main (2e4af4d) will increase coverage by 0.01%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1520      +/-   ##
==========================================
+ Coverage   89.23%   89.24%   +0.01%     
==========================================
  Files         162      162              
  Lines        3056     3059       +3     
  Branches      521      522       +1     
==========================================
+ Hits         2727     2730       +3     
  Misses        201      201              
  Partials      128      128              

Flag	Coverage Δ
unittest	89.24% <ø> (+0.01%)	⬆️

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Files Changed	Coverage Δ
...gin-template/src/rules/prefer-self-closing-tags.ts	100.00% <ø> (ø)
...late/tests/rules/prefer-self-closing-tags/cases.ts	100.00% <ø> (ø)

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[JamesHenry]

Thanks @json-derulo!