Disable asterisk char escaping + Add `$escape` parameter to several methods of `Result`

[vjik]

Q	A
Is bugfix?	✔️
New feature?	✔️
Breaks BC?	❌
Fixed issues	#610

[what-the-diff[bot]]

PR Summary

• New escape parameter enhancement Added a new parameter ($escape) to methods Result::getAttributeErrorMessagesIndexedByPath() and Result::getErrorMessagesIndexedByPath() for customizing or disabling the escape symbol in value path elements.
• Bug fix for escaping asterisk character Fixed a bug that caused improper escaping of the asterisk character in value paths returned by Error::getValuePath(true).
• Updated methods for escape parameter Modified Error::getValuePath, Result::getErrorMessagesIndexedByPath, and Result::getAttributeErrorMessagesIndexedByPath to accept new parameters relating to escape symbols.
• New tests for escape functionality Added tests to validate the escape functionality in Result::getErrorMessagesIndexedByPath and Result::getAttributeErrorMessagesIndexedByPath methods.

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.01 :tada:

Comparison is base (ebf6636) 94.29% compared to head (534faea) 94.30%.

:exclamation: Current head 534faea differs from pull request most recent head 32f9168. Consider uploading reports for the commit 32f9168 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #612 +/- ## ============================================ + Coverage 94.29% 94.30% +0.01% - Complexity 746 749 +3 ============================================ Files 88 88 Lines 2277 2281 +4 ============================================ + Hits 2147 2151 +4 Misses 130 130 ``` | [Impacted Files](https://app.codecov.io/gh/yiisoft/validator/pull/612?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft) | Coverage Δ | | |---|---|---| | [src/Rule/Nested.php](https://app.codecov.io/gh/yiisoft/validator/pull/612?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft#diff-c3JjL1J1bGUvTmVzdGVkLnBocA==) | `80.71% <ø> (ø)` | | | [src/Error.php](https://app.codecov.io/gh/yiisoft/validator/pull/612?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft#diff-c3JjL0Vycm9yLnBocA==) | `100.00% <100.00%> (ø)` | | | [src/Result.php](https://app.codecov.io/gh/yiisoft/validator/pull/612?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=yiisoft#diff-c3JjL1Jlc3VsdC5waHA=) | `100.00% <100.00%> (ø)` | |

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