Closes #5723 Add a filter to enable/disable the noscript tag of lazyloaded images

[Tabrisrp]

Description

Closes #5723

Also includes changes to pass PHPStan level 9.

Documentation

User documentation

Add a new filter rocket_lazyload_noscript with a boolean value, that can be used to enable/disable the noscript tag added to lazyloaded images.

Technical documentation

Add a new method noscriptEnabled(), and use it in the lazyloadImages and lazyloadPictures methods.

Type of change

• Enhancement (non-breaking change which improves an existing functionality).

Checklists

Feature validation

• I validated all the Acceptance Criteria. If possible, provide sreenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I implemented built-in tests to cover the new/changed code.

Documentation

• I prepared the user documentation for the feature/enhancement and shared it in the PR or the GitHub issue.
• The user documentation covers new/changed entry points (endpoints, WP hooks, configuration files, ...).
• I prepared the technical documentation if needed, and shared it in the PR or the GitHub issue.

Code style

• I wrote self-explanatory code about what it does.
• I wrote comments to explain why it does it.
• I named variables and functions explicitely.
• I protected entry points against unexpected inputs.
• I did not introduce unecessary complexity.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -0.10%)	❌ 47.62% (target: 50.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (9fe189b)	37343	14541	38.94%
Head commit (86f3f96)	37369 (+26)	14552 (+11)	38.94% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#6824)	42	20	47.62%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[hanna-meda]

This looks good. Explored also with js disabled in browser and update/rolllback with/without LL enabled and/or filter active.
Relating TP results:
testrail-report-625.pdf