feat: add --parallel flag yarn test cmd

[jordaniza]

Description

Use HH tests in parallel by default by adding the flag to yarn test
Also added yarn test:sequential for tests not using parallel

Increased the timeout to 90 seconds.

NOTE: some tests fail with PSP. This is unrelated to this PR and addressed in a separate PR.

Task ID: OS-1039

Type of cha

• New feature (non-breaking change which adds functionality)

Checklist:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.
• I ran all tests with success and extended them if necessary. NO NEW TESTS BREAK.
• I have updated the CHANGELOG.md file in the root folder.
• I have updated the DEPLOYMENT_CHECKLIST file in the root folder.
• I have updated the UPDATE_CHECKLIST file in the root folder.

[heueristik]

Nice!