Update to macos-latest

[Alan-Jowett]

This pull request includes changes to the GitHub Actions workflow file .github/workflows/main.yml. The changes involve updating the macOS platform version from macos-11 to macos-latest for various jobs in the workflow.

Here are the key changes:

• .github/workflows/main.yml: Updated the macOS platform version for the following jobs:
  • macos_release: This job now uses the macos-latest platform instead of macos-11.
  • macos_release_coverage: This job now uses the macos-latest platform instead of macos-11.
  • macos_release_sanitizers: This job now uses the macos-latest platform instead of macos-11.
  • macos_debug: This job now uses the macos-latest platform instead of macos-11.
  • macos_debug_coverage: This job now uses the macos-latest platform instead of macos-11.
  • macos_debug_sanitizers: This job now uses the macos-latest platform instead of macos-11.

These changes will ensure that the GitHub Actions workflows run on the latest version of macOS, potentially benefiting from any updates or improvements made in the latest version.

[coveralls]

coverage: 82.171%. first build when pulling 90b0dbcdf4e1a2b2141c953988319954bde7b943 on Alan-Jowett:update_macos into a299839f3d075c68e596d68647915166e1722b1a on iovisor:main.