Fix Google map marker pin icon rendering in listing maps

[RabbiIslamRony]

PR Type

What kind of change does this PR introduce?

• Bugfix
• Security fix
• Improvement
• New Feature
• Refactoring (no functional changes, no API changes)
• Build related changes
• Text changes
• Other — Please describe:

Description

This PR fixes the map marker icon rendering across Google Map views by ensuring a consistent icon source and removing conflicting legacy styles.

Before
https://prnt.sc/u6k5Gc2CeVYW
After
https://prnt.sc/WmL7gBkqYpiz

Changes included:

• Fix map marker icon rendering in Google Map views by setting --directorist-icon inline to the correct Font Awesome marker SVG (map-marker-alt.svg).
• Apply consistent marker icon behavior across:
  • Add Listing map
  • Single Listing map
  • Single Listing Map widget
• Remove outdated SCSS override that forced map-pin.svg, which conflicted with the JavaScript marker setup.

Why

Previously, marker icons appeared inconsistent across different map contexts due to mixed icon sources (map-pin vs map-marker-alt) and a legacy SCSS override. This update standardizes icon rendering and eliminates style conflicts.

Test Plan

• Ensure the selected map type is Google Map (example: https://prnt.sc/Hvo_5n2MkYr0)
• Open the Add Listing page and confirm the map marker icon is visible and correct.
• Open the Single Listing page and confirm the map marker icon is visible and correct.
• Open the Single Listing Map Widget and confirm the marker icon matches other map views.
• Verify that marker hover and shape styling still work as expected.

Linked Issues

https://taiga-sovware-u10698.vm.elestio.app/project/directorist/issue/2605

Checklist

• My code follows the WordPress Coding Standards.