chore: Update ci

[tottoto]

Updates ci configs.

• Fixes the yaml indent.
• Replaces arduino/setup-protoc with taiki-e/install-action as it is unmaintained.
• Removes git submodule as it seems not to be used.
• Removes the disabled ci job as it is outdated and seems to be difficult to keep up to date.
• Refactors ci job step names.
• Replaces seanmiddleditch/gha-setup-ninja with in-tree action as it is unmaintained.
• Changes ci name shorter in order to improve readability.