Do not escape strings during the search

[XVilka]

Your checklist for this pull request

• I've read the guidelines for contributing to this repository
• I made sure to follow the project's coding style
• I've added tests that prove my fix is effective or that my feature works (if possible)
• I've updated the documentation and the rizin book with the relevant information (if needed)

Detailed description

Do not escape special characters during the string search process, only on printing (iz commands)

Test plan

CI is green

Closing issues

Required for #1752

[XVilka]

Closing in favor of #1752 since it requires changes in the C commands as well.