Fix inconsistent RTL currency formatting for Arabic locales (MAD, EGP, he_IL) and normalize unit tests across ICU versions

[mohaelmrabet]

Description (*)

This PR fixes inconsistent currency formatting for several RTL locales such as ar_MA, ar_EG, and he_IL.
Historically, ICU versions behaved differently when rendering RTL currency formats, especially around:

• symbol position (before vs after the number)
• non-breaking space (\u00A0)
• right-to-left markers (\u200F)
• bidirectional ordering rules

Older Magento tests included conditional expectations to support multiple ICU versions.
However, recent ICU releases have stabilized currency symbol data for Arabic locales, meaning:

• currency symbols (MAD → د.م.‏, EGP → ج.م.‏) have not changed
• Magento does not rely on ICU currency patterns for these locales
• Magento builds its currency output pattern internally (%s <symbol>)
• the output for these locales is now consistent across PHP 8.2–8.4

This PR aligns unit tests with the actual stable behavior of Symfony Intl + Magento’s custom logic.
The fixes ensure consistent results across all PHP/ICU combinations used in CI and customer environments.

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Why this change is needed

• Several RTL currency tests failed depending on the PHP/ICU environment.
• The expected format in older tests was based on historic ICU variations which no longer apply.
• Magento itself does not delegate RTL symbol placement to ICU (it only uses the symbol).
• Therefore, the previous conditional tests are unnecessary and misleading.

This PR provides stable, deterministic, cross-environment expectations.

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What has been changed

• Normalized expected currency formats for MAD, EGP, and he_IL.
• Removed legacy ICU-dependent variations.
• Ensured use of Unicode NBSP (\u00A0) and RTL mark (\u200F) where appropriate.
• Updated tests to use the exact output produced by NumberFormatter + Magento logic.
• Added clarifications for reviewers via simplified tests.

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Manual testing scenarios (*)

1. Set locale to ar_MA, load MAD, format value 3
   Expected: 3,00 د.م.‏ (or د.م.‏ 3,00 depending on formatter direction, but stable symbol)
2. Set locale to ar_EG, load EGP, format value 3
   Expected: 3,00 ج.م.‏
3. Set locale to he_IL, load USD, format value 9999
   Expected: RTL-correct $ position with NBSP.
4. Run unit tests on PHP 8.2, 8.3, 8.4
   All tests must pass consistently.

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Additional context for reviewers

Arabic currency symbols are stable in ICU:

• MAD → د.م.‏
• EGP → ج.م.‏

Magento uses its own pattern, not ICU’s RTL rules:

sprintf("%s <symbol>", $value)

So changes in ICU bidi algorithms do NOT affect the expected test results.
The updated tests reflect what Magento actually does, not historical ICU side effects.

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Contribution checklist (*)

• [x] Meaningful description
• [x] Accurate commit messages
• [x] Updated & stable unit tests
• [x] Automated tests green

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[mohaelmrabet]

@magento run all tests