Improve GLSL ES3.00 shader syntax compatibility

[zhuxudong]

Please check if the PR fulfills these requirements

Fix #2047

• [x] The commit message follows our guidelines

• [ ] Tests for the changes have been added (for bug fixes / features)

• [ ] Docs have been added / updated (for bug fixes / features)

• Support texture grad,proj etc function

• Support gl_FragDepthEXT when use glslES 1.00

• Fix fragment out written use glslES 1.00

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 66.10%. Comparing base (6c06394) to head (09dea9d). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2048 +/- ## ========================================== + Coverage 66.05% 66.10% +0.05% ========================================== Files 460 460 Lines 22996 23000 +4 Branches 3369 3369 ========================================== + Hits 15190 15205 +15 + Misses 6645 6631 -14 - Partials 1161 1164 +3 ```

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[GuoLei1990]

Completed supplementary inspection：

[GuoLei1990]

Babylon.js don't have this bug