Fix grpc build

[crazywhalecc]

What does this PR do?

Closes #1054

Checklist before merging

If your PR involves the changes mentioned below and completed the action, please tick the corresponding option.
If a modification is not involved, please skip it directly.

• If you modified *.php or *.json, run them locally to ensure your changes are valid:
  • composer cs-fix
  • composer analyse
  • composer test
  • bin/spc dev:sort-config
• If it's an extension or dependency update, please ensure the following:
  • Add your test combination to src/globals/test-extensions.php.
  • If adding new or fixing bugs, add commit message containing extension test or test extensions to trigger full test suite.

[crazywhalecc]

Using ext-grpc to compile all grpc dependencies looks not good for our build procedure.

First of all, it's too slow for building static php binary every time. Building separately could reduce a lot of time when debugging and publishing. And another potential issue is building openssl, libcares and zlib twice. And also, although we can make a patch for boringssl and openssl built by grpc source to solve the CI error above, it often leads to misleading errors when building in-tree ext-grpc with all dependencies.