chore: Configure a11y test suite for CI pipelines

[sdrozdsap]

• Add a11y test suite definition and scripts

• Configure CI to run a11y tests on PR and develop branch

[cypress]

spartacus    Run #47822

Run Properties:   Passed #47822  •  ae87b6fef8 ℹ️: Merge 7ee06ca9c5cf48810f9207c0ccd5457655702994 into 3aea264f0ae5c1a3565c2f870eac...

Project	spartacus
Branch Review	chore/a11y-test-suite-ci
Run status	Passed #47822
Run duration	04m 46s
Commit	ae87b6fef8 ℹ️: Merge 7ee06ca9c5cf48810f9207c0ccd5457655702994 into 3aea264f0ae5c1a3565c2f870eac...
Committer	sdrozdsap
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Test results
Failures	0
Flaky	5
Pending	2
Skipped	0
Passing	132
View all changes introduced in this branch ↗︎

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[github-actions]

Merge Checks Failed

Please push a commit to re-trigger the build.
To push an empty commit you can use `git commit --allow-empty -m "Trigger Build"`

[github-actions]

Merge Checks Failed

Please push a commit to re-trigger the build.
To push an empty commit you can use `git commit --allow-empty -m "Trigger Build"`

[github-actions]

Merge Checks Failed

Please push a commit to re-trigger the build.
To push an empty commit you can use `git commit --allow-empty -m "Trigger Build"`

[github-actions]

Merge Checks Failed

Please push a commit to re-trigger the build.
To push an empty commit you can use `git commit --allow-empty -m "Trigger Build"`

[github-actions]

Merge Checks Failed

Please push a commit to re-trigger the build.
To push an empty commit you can use `git commit --allow-empty -m "Trigger Build"`